Masami Hirosaka

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(広坂正美, Hirosaka Masami, born February 26, 1970, Kyoto, Japan) is a Japanese radio controlled car driver who is considered to be the world's most successful with a record fourteen IFMAR World Championships in 1/12 scale electric, 1/10 scale Pan, 1/10 scale 2WD off road and 1/10 scale 4WD, all electric. Hirosaka's peers have nicknamed him "Master Masami". He was considered to be one of the highest paid drivers in RC racing, until he retired from the activity. His last IFMAR race was the 2008 world championship in Thailand. His retirement ceremony was on May 3, 2009.

Early years

Masami was first brought into RC car racing at the age of seven by his father Masaaki; a former motorcycle racer, who finished 2nd at the 1971 Suzuka 6 Hours, a research and development employee of ABC Hobby and later with Yokomo and radio controlled car racer and designer, when he brought him a Tamiya Lamborghini Countach. They raced together for four years until upon realizing Masami was the better driver, Masaaki retired from racing to focus on becoming his mechanic.

In 1987, during a world championship round for the 4WD off-road at Romsey, England, Hirosaka arrived as a privateer with a Schumacher CAT, bar being provided power sources from HPI Japan. He had shown promise during practice and was brought into attention by Phil Booth, Schumacher's works driver who referred him to Cecil Schumacher, who provided him a longer wheelbase version called the CAT XL, then unavailable in Japan and was raced by a majority of racers. Despite being near-stock with much of the running gear added on from his old CAT, Hirosaka managed to win the title. After the win, he was given numerous offers from sponsors before he ultimately settled with Yokomo.

Later activities

As well as driving for Yokomo and Associated Electrics where he helps develop and design new cars and tests the resulting prototypes, Hirosaka held a job as a sales engineer for Yokomo. Of all his IFMAR championship wins, only his first title was won driving cars from neither of these manufacturers. He was driving a Schumacher CAT XL.

For once or twice a week, he practices for 100 runs, a majority of these is done on-road to improve his reflexes.

In a 1998 interview with Germany's KEIL DTM magazine, Hirosaka listed his other hobbies as computers and theater. His father who is now semi-retired, runs an RC car preparation service whilst doing contract work for Kyosho. In a 1999 interview with RCCA, he said that he has appeared several times on Japanese TV. He also says that he has several non-RC sponsors, such as Pioneer.

In his later career, he mentored teammate and compatriot Naoto Matsukura[8] and was the lead organizer of the 2015 IFMAR 1:10 Electric Off-Road World Championship[9]

Equipment

Throughout his career, Masami preferred to race with stick transmitters, largely as when he began racing, Japanese branded wheel transmitters did not exist; he once experimented with wheels but felt sticks gave better car control. Up until 1987, he used Futaba transmitter; after that he switched to KO Propo which he used through his career. Under his arrangement with Yokomo, his car ran on Reedy motors, a subsidiary of Associated Electrics.

Throughout his career, Masami has always raced in the green over white with pink flames (similar style to those found typically in hot rods), but since the 1990s, the pink colour has become less dominant part of the colour as he added the orange and red to form part of his current colour scheme.

Achievements

Throughout his competition career, Hirosaka has a total of 307 victories out of a total of 447 races, with 47 second-place finishes and 27 third.

He has a total of 37 World Championship starts with 25 podium appearances including 14 championship titles and 35 A-main appearances.

Out of a total of 70 JMRCA All-Japan Championship appearances, he won 52 of those spanning 21 consecutive years (1986-2006), 67 of those are A-main appearances.

In 1998, he is one of two drivers to achieve an electric car clean sweep at the JMRCA All-Japan Championship, the only driver to achieve this more than once (also 1987, 1989 and 1992) and the only one to achieve five out of five wins in eligible classes, a feat no longer possible since 2005 when the 1:10 Racing class was discontinued.

An article by Radio Control Car Action list him on the top spot as the five greatest driver of all-time in 2010 In the 2015 edition of the Top 10 best of all-time, he was beaten to the spot by Ryan Cavalieri.

Listed in RCCA in its May issues as one of the 10 Best Drivers between 1989 up to 1992. When the readers ranking was introduced, he was ranked 5th in 1996, 2nd in 1998 and 3rd in 1999. Hirosaka is the only few non-US drivers to be honoured and the only foreigner to regularly appear in the list.

Information gathered from Wikipedia and other sources around the internet.

Schumacher CAT XLS Masami 4WD K172

Car by Schumacher Setups
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2002 1/12 World Championship Car

Post 2y ago Vintage
IFMAR 1:12th EP On-Road World Championship in SOUTH AFRICA

The car used in this race is the Associated RC12L3 fully tuned by Yokomo. The material, shape and thickness of the main chassis, as well as the position of the battery, have been thoroughly tested on-site in advance, making this a special car which can handle low-grip asphalt surfaces.

It was a rare car which gained an advantage over other cars as the track surface grip decreased. South Africa was the farthest country I have participated in so far, and I was not in the best mental condition for the race because of the fatigue from the long trip, security issues.

However, the car had an advantage like never before, and I was able to win both the qualifying and the final rounds without losing a single top time.

The motor I used Reedy modified, the battery was Sanyo, the ESC was GM Racing, the servo was KO PROPO, the body was Andy's, and the tires were TRC and JACO Racing.

On the big stage of the world, running at a breakneck speed,
The car which contributed to the acquisition of the 13 times World Champion 
"YOKOMO RC12L3Y".
------------------------------
この大会で使用した車は、アソシエイテッド RC12L3をヨコモがフルチューンしたもの。メイン シャーシの材質、形状、厚み、そしてバッテリーの搭載位置などを現地で事前に徹底テストし、低グリップのアスファルト路面に対応したスペシャルマシン。

路面グリップが下がれば下がるほど、他車よりもアドバンテージを得られる珍しい車だった。南アフリカは、今まで参加した世界選手権の中で最も遠い国で、長旅の疲れや治安の問題、慣れない食事など、ベストな精神状態で臨める大会ではなかったが、過去にないほど車にアドバンテージがあり、予選、決勝共に、1つのラウンドもトップタイムを明け渡すことなく優勝することができた。

使用モーターはリーディ、バッテリーはサンヨー、ESCはGM Racing、サーボはKO PROPO、ボディはアンディーズ、タイヤはTRCとJACOだった。

世界の大舞台で、ぶっちぎりの速さで走ってくれて、
13度目の世界チャンピオン獲得に貢献してくれた車は
『YOKOMO RC12L3Y』。

#IfmarWorldChampionCar #IFMAR世界選手権優勝マシン

2000 1/10 Onroad World Championship Car

Post 2y ago Vintage
IFMAR 1:10th EP On-Road World Championship in JAPAN

This is the second time that the EP car World Championship has been held in Japan, following the Off-road race in 1995. This time, On-road, 3 classes, 1/10th, 1/12th and ISTC (Touring) were held at the same time. The venue is Yatabe Arena in Ibaraki prefecture. It was midsummer, and the conditions were quite difficult for both humans and cars.

I had participated in all three classes, and due to the fatigue from the practice and tests, I was a little exhausted when the actual event began. In addition to being held in Japan, it was also held at the home track, so I was able to participate in the race while getting sick due to the intense pressure, the heat, and the battle for the top with the strong competitors.

The car which was developed for this race has changed the shape of the main chassis and all of the rear suspension systems, and introduced a special car which matches the track.

In the finals, I was able to beat Mr. Daisuke Yoshioka of Team HPI for the championship, and was able to win the World Championship held in Japan for the first time.
The main equipment used was a Sanyo Yokomo battery, Reedy motor, GM ESC, KO servo, JACO & TRC tires, and Protoform body.

The car which contributed to the acquisition of the 11 times World Champion
"YOKOMO YRX2000".
------------------------------
電動カーの世界選手権が日本で開催されたのは、1995年のオフロード種目に続き今回が2回目。今回はオンロード種目で、1/10、1/12とISTC(ツーリング)の3種目が同時期に開催された。会場は茨城県つくば市にある谷田部アリーナ。真夏の時期という事もあり、人間にとっても、車にとってもかなり過酷な条件下だった。

私は3種目すべてに参加していたこともあり、その練習やテストでの疲労により、本番が始まる時には少しバテ気味だった。また、日本開催である上に、ホームサーキットでの開催ということもあり、強烈なプレッシャーと蒸し暑さ、そして並みいる強豪たちとのトップ争いで、めずらしく体調を崩しながらのレース参加となった。

このレースのために開発してきた車は、メインシャーシの形状やリヤ部のサスペンション システムの全てを変更したもので、サーキットに合わせたスペシャル マシンを投入した。

決勝ではチームHPIの吉岡大輔 氏との優勝争いに競り勝ち、日本で開催された世界選手権で初優勝することができた。

主な使用機材は、サンヨーヨコモ バッテリー、Reedy モーター、GM ESC、KOサーボ、JACO &TRCタイヤ、プロトフォーム ボディを使用した。

11回目の世界チャンピオン獲得に貢献してくれた車は
『YOKOMO YRX2000』。

#IfmarWorldChampionCar #IFMAR世界選手権優勝マシン

1999 1/10 2WD World Championship Car

Post 2y ago Vintage
IFMAR 1:10th EP Off-Road World Championship 2WD Class in Finland

At the World Championship held in Finland, the 4WD class, which started first, was in big trouble. The Yokomo's prototype car, which had been tested and practice for two years, struggled with the track layout and failed in qualifying. 
I retired in the B final and finished 20th.

For the first time in a RC race, I recorded the lowest place in almost 20 years. Since I was betting everything on the 4WD class, I went to the field after only two days of practice and preliminary tests for the 2WD class.

For the past two years, I have had little time to practice and test my 2WD. There is no way I can win in such a situation. Moreover, the 2WD class World Championship started with the shock of the crushing defeat of the 4WD class that challenged with full confidence.

While Team Losi entered the race with a new car and Team Kyosho entered with a prototype car, Our Team Associated's car was a mature production car.

Contrary to expectations, they set a series of good lap times, and although Team Losi's Mr. Brian Kinwald took the lead in qualifying, Mr. Mark Pavidis finished 2nd and I was 3rd.

In the final, I won the Championship after a fierce battle between the 3 cars. This was the first and last time I won the World Championship by starting the finals from a position other than 1st place in the qualifying.

The car which showed me heaven after hell and made me the 10th time World Champion
"ASSOCIATED RC10B3".
------------------------------
フィンランドで開催された世界選手権では、最初に始まった4WDクラスで大波乱。2年間煮詰めて持ち込んだプロトカーがコースレイアウトに苦戦して予選落ち。決勝でもリタイヤして結果は20位だった。

ラジコンレースを初めてほぼ20年の中で最下位を記録した。4WDクラスに全てを賭けていたので、2WDクラスの練習及び事前のテストはたったの2日間しか行えずに現地入りしていた。

2WDのテスト走行や練習時間は殆ど取ることができなかったこの2年間。そんな状況で優勝など出来るわけがない。しかも自信満々で挑んだ4WDの大敗のショックを引きずったまま、2WDクラスの世界選手権がスタートした。

チームロッシはニューマシン、チーム京商はプロトタイプマシンで参戦する中、我々チーム アソシエイテッドのマシンは熟成された市販車だった。

すると予想に反して好タイムを連発、予選トップ通過こそチームロッシのブライアン・キンワルド氏にとられたが、マーク・パビダス氏が2位、広坂は3位で通過することができた。

決勝では3台による熾烈な優勝争いの末、何と広坂が優勝した。予選1位以外からの決勝スタートで優勝した世界選手権はこれが最初で最後だった。

地獄のあとに天国を見せて、10度目の世界チャンピオンにならせてくれたマシン
『ASSOCIATED RC10B3』。

#IfmarWorldChampionCar #IFMAR世界選手権優勝マシン

1997 1/10 4WD World Championship Car

Post 2y ago Vintage
IFMAR 1:10th EP Off-Road World Championship 4WD Class in USA

The World Championship were held at the RANCH PIT SHOP in Pomona, California, USA. This track is the home of one of our biggest rivals, Team Losi. It was a completely away race.

I received full support from the tire manufacturer Proline, but I believed that the track surface would definitely match Losi's tires, so I brought in a large number of Losi tires and matched my car with Losi tires. 
My guess was right, and my car, which was fitted with Losi tires, was running at a time equal to or better than that of Team Losi's cars.

The car we used was Yokomo's new prototype, and most of the chassis, body, wing, suspension, wheels, etc. were newly designed.
We prepared a special car which was made to match the RANCH PIT SHOP track.

My team-mate Mr. Mark Pavidis, with the same setting as me, was able to finish high in qualifying, which was a big factor in getting me closer to victory.
In the final, I was able to break away from Team Schumacher's Mr. Jukka Steenari and Mr. Teemu Leino to give me the top finish.

I was able to win the 4WD as well as the 2WD at the World Championship in the United States, that is said to be the most difficult to win in the world. The name of the car which won my 9th world title was the "YOKOMO MX-4".
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アメリカ・カリフォルニア州のポモナにあるRANCH PIT SHOPで開催された世界選手権。 このサーキットは、私たちの最大のライバルの 1 つであるチーム ロッシのホームサーキット。

広坂は、タイヤメーカーのプロライン社に全面的にサポートを受けている身でしたが、「本番では必ずロッシタイヤに路面がマッチするはず」と考え、大量のロッシタイヤを持ち込み、自分の車をロッシのタイヤにマッチングさせて準備した。
その予想は的中し、ロッシタイヤを履いた私の車は、チーム ロッシの車と同等かそれ以上のタイムで走行することが出来た。

使用した車は、ヨコモの新型プロトタイプで、シャーシ、ボディ、ウイング、サスペンション、ホイールなどのほとんどが新設計したもので、RANCH PIT SHOPサーキットに合わせた特別仕様車を準備した。

同じセッティングを施した、チームメイトのマーク・パビディス選手が予選で上位に食い込んでくれたことが、優勝に近づけた大きな要因だった。
決勝ではチーム シューマッカーのユカ・ステナリ氏とティーム・レイノ選手を振り切ってトップフィニッシュ。

世界で最も勝つのが難しいと言われるアメリカでの世界選手権において、2WDに続き4WDでも優勝することが出来た。
自身9度目の世界タイトルを手にしたそのマシンの名は『YOKOMO MX-4』。

#IfmarWorldChampionCar #IFMAR世界選手権優勝マシン

1996 1/12 World Championship Car

Post 2y ago Vintage
IFMAR 1:12th EP On-Road World Championship in USA

The first World Championship on asphalt road surface in which I participated was held at an outdoor circuit in California, USA.

A Worlds car which was created by adding Yokomo's taste to Associated's car while repeating local pre-tests.

The combination of American tire manufacturer JACO tires, Reedy motor, Protoform body, TEKIN ESC, and KO PROPO's equipment were the best match.

After a fierce battle with Mr. Berry Baker and Mr. Brian Kinwald of the United States, it was my second victory in the 1/12th race and my 8th world title.

"ASSOCIATED RC12LS Yokomo special" contributed to winning the world title for the 8th time in total by scoring top finish in both the qualifying and the final.
------------------------------
自身が参加する中では初めてのアスファルト路面での世界選手権が、アメリカ・カリフォルニア州にあるアウトドア サーキットで開催された。

現地での事前テストを繰り返しながら、アソシエイテッドのマシンにヨコモテイストを加えて作ったワールズカー。アメリカのタイヤメーカーであるJACO製のタイヤや、リーディ モーター、プロトフォーム ボディ、TEKIN ESC、KO PROPOのメカなどの組み合わせがベストマッチだった。

アメリカのベリー・ベーカー氏やブライアン・キンワルド氏との激しいバトルの末、同種目2度目の優勝、8度目の世界タイトル獲得となった。

予選、決勝共にトップゴールし、通算8度目の世界タイトル獲得に貢献してくれた『ASSOCIATED RC12LS Yokomo special』。

#IfmarWorldChampionCar #IFMAR世界選手権優勝マシン

1994 1/10 Onroad World Championship Car

Post 2y ago Vintage
IFMAR 1:10th EP On-Road World Championship in GERMANY

The second time of race commonly known as PRO10, which was newly started at IFMAR. 
At that time, this race had not yet penetrated Japan or other countries, especially in the Asian region, and I was the only Japanese participating from the Asian region.

During the short development period of about half a year, a car dedicated to World Championship was completed by repeating test runs in Germany in advance.

The tires we got from the Mr. Gandini brothers of Gandini Racing Products, the tire manufacturer we met at the race track, were the best match for the track surface. And the ESC was made by TEKIN.

For the body, we obtained a lightweight Protoform body, which had not yet been sold in Japan, locally, and the staff painted it on site.

The week before this race, the battle for victory with Team Corally's Mr. David Spashett, who won the 1/12th World Championship held in France, was tangled up to the final round, but I was able to get the 8th World title.

The "YOKOMO YRX-10 worlds special" scored top finish in both the qualifying and the finals, contributing to winning all 4 categories in which I participated.
------------------------------
IFMARで新しくスタートした、通称プロ10と呼ばれていた種目の第2回目の大会。この種目は、当時日本も他の国にも、特にアジア地区にはまだ浸透しておらず、アジア地区から日本人ただ一人での参加だった。

約半年間ほどの短い開発期間の中、事前に現地ドイツでのテスト走行などを繰り返して仕上げた世界選手権専用のマシン。
現地で出会ったタイヤメーカー、Gandini Racing Products (GRP) のガンディニ兄弟から入手したタイヤが路面にベストマッチした。

ESCはTEKIN製、モーターはリーディ、ボディは日本ではまだ販売されていなかったプロトフォームの軽量ボディを現地で入手し、現場でスタッフが塗装してくれた。

このレースの前の週、フランスで開催された1/12の世界選手権で優勝した、チームコラリーのデビッド・スパシェット選手との優勝争いが決勝の最終ラウンドまでもつれたが、世界戦7勝目を手にすることが出来た。

予選、決勝共にトップゴールし、出場している全4種目の優勝に貢献してくれた『YOKOMO YRX-10 worlds car』

#IfmarWorldChampionCar #IFMAR世界選手権優勝マシン

1993 1/10 4wd World Championship Car

Post 2y ago Vintage
IFMAR 1:10th EP Off-Road World Championship 4WD Class in ENGLAND

My first Off Road World Championship was also held in England. This time, our biggest rival was local Team Schumacher, who had been indebted to me before.

The car which Yokomo brought in after repeated on-site tests in advance was equipped with an undercarriage that emphasized toughness and durability, with reinforced wheels and resin wings.

There were Yokomo tires brought in in large quantities to match the road surface, but I purposely used the tires provided by Proline, which had faster corner speeds.

In the final race, there was a scene where I fell back to the back due to my own crash, but I managed to overtake 9 cars in the final race, the first and last in my life, and finally finished in the top.

"YOKOMO SUPER DOGFIGHTER WORKS 93 Worlds Special" contributed to the 6th world title by scoring top finish in both the qualifying and the finals.

------------------------------

4WDクラスで最初に参加した世界選手権も同じイギリスでの開催だった。今回は以前お世話になった、地元チーム シュマッカーが最大のライバルチームとなった。

ヨコモが事前に現地テストを繰り返して持ち込んだ車は、強靭かつ耐久性を重視した足回りを備え、ホイルは強化タイプ、ウイングは樹脂製で徹底的に5分間しっかりと走れるマシンだった。

現地では大量に持ち込んだヨコモ製のタイヤで路面にマッチするモノもあったが、広坂はあえてコーナースピードが速かった、プロラインから提供されたタイヤを使用した。

決勝レースでは、自らのクラッシュで最後尾に後退する場面もあったが、最終的にはRC人生最初で最後の世界戦決勝9台抜きを果たして優勝した。

予選、決勝共にトップゴールし、6度目の世界一に貢献してくれた『YOKOMO SUPER DOGFIGHTER WORKS93 Worlds Special』。

#IfmarWorldChampionCar #IFMAR世界選手権優勝マシン

1991 1/10 2wd World Championship Car

Post 2y ago Vintage
IFMAR 1:10th EP Off-Road World Championship 2WD Class in USA

The car I used was a stealth car which Associated had been developing in secret. The existence of this car was not known in advance and was handed over from Mr. Cliff Lett on site.
Although the parts were not machine made but molded (mass-produced type), it was a very rare car which was not sold later and was hardly exposed to the media.

The 30 series tires and special shock springs brought by Yokomo matched the race track, and the Stealth Car was able to gain a further advantage, but the team, which was the biggest rival team, was in a battle for victory with Team Losi squad. It was fierce until the very end.

In the end, the Associated car and our team finished 1-2, and in the 2WD class, following the match against Australia, I won two tournaments in a row and won the world title for the fifth time in total.

The "ASSOCIATED RC10BX STEALTH" contributed to winning the 2WD class in the USA, that was said to be the most difficult to win, by scoring top finish in both the qualifying and the final.
------------------------------
使用したマシンは、アソシエイテッドが極秘で開発を進めていたステルスカーだった。このマシンの存在は事前にも知らされておらず、現地でクリフ・レット氏より手渡しされた。

パーツ類は削り出しではなく成型品(量産タイプ)であったにもかかわらず、後に販売されることもメディアに露出することも殆ど無かった、ごく稀な車となった。

ヨコモが持ち込んだ30シリーズと呼ばれるタイヤとスペシャル ダンパースプリングがサーキットにマッチし、ステルスカーは更にアドバンテージを得ることが出来たが、最大のライバルチームだったチーム ロッシ勢との優勝争いが最後の最後まで熾烈だった。

最終的にはアソシ チームの1-2フィニッシュとなり、2WDクラスではオーストラリア戦に続き、2大会連続優勝で通算5度目の世界タイトル獲得となった。

予選、決勝共にトップゴールし、最も難しいとされていたアメリカでの2WDクラス優勝に貢献してくれた
『ASSOCIATED RC10BX STEALTH』。

#IfmarWorldChampionCar #IFMAR世界選手権優勝マシン

Interests

Category Cars Class Offroad Onroad Scale/Size 1/10 1/12

Master Masami

Image 3y ago

1989 IFMAR World Championship. Associated RC10GX Stealth

Image 3y ago

Masami’s 1991 Detroit Worlds Winning RC10

Post 3y ago
In 1991, Masami Hirosaka drove this RC10 buggy to win an IFMAR World Championship for Team Associated. These are photos of the very RC10 Masami drove in Detroit, Michigan in this historic race.

One of the first things I noticed was the excessive use of custom machined parts. Many of the basic designs ended up in later versions of the RC10, which is cool. It makes me wonder what the heck those guys who say it’s all the driver are thinking. This buggy looks like something we would see today! And this was created in 1991?

YouTube Channel

Social Media 3y ago

Tamiya Blog - 14 RC Car World Championship Title Wins

Web link 3y ago Blogs

Yokomo 870C Worlds Car Masami Hirosaka 1989

Post 3y ago Projects & Builds
Masami won the IFMAR Worlds 1989 in Sidney/Australia with this prototype car.
Organizations
Team Associated Partner
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