is a Japanese Kyokushin kaikan karateka. In March 1991 he completed the 100 man kumite supervised by Mas Oyama.

He was born in 1962 in Kanazawa

Kanazawa, Ishikawa

is the capital city of Ishikawa Prefecture, Japan.-Geography, climate, and population:Kanazawa sits on the Sea of Japan, bordered by the Japan Alps, Hakusan National Park and Noto Peninsula National Park. The city sits between the Sai and Asano rivers. Its total area is 467.77 km².Kanazawa's...

, Ishikawa

Ishikawa

-Places:*Ishikawa Prefecture*Ishikawa-gun, district, Ishikawa Prefecture*Ishikawa-gun, district, Fukushima Prefecture*Ishikawa-machi, town, Fukushima Prefecture*Ishikawa-shi, city, Okinawa Prefecture-Real people:*Alexandre Ishikawa, Brazilian director...

, Ishikawa prefecture

Ishikawa Prefecture

is a prefecture of Japan located in the Chūbu region on Honshū island. The capital is Kanazawa.- History :Ishikawa was formed from the merger of Kaga Province and the smaller Noto Province.- Geography :Ishikawa is on the Sea of Japan coast...

, Japan. In junior high school he was captain of the school judo club. When he was 16 years old he joined Kyokushin

Kyokushin

is a style of stand-up, full contact karate, founded in 1964 by Korean-Japanese karate master, who was born under the name Choi Young-Eui . Kyokushinkai is Japanese for "the society of the ultimate truth". Kyokushin is rooted in a philosophy of self-improvement, discipline and hard training...

 Kaikan Ishikawa Dojo. At 19 years old he made his debut in his first All Japan Tournament.

He remained a top athlete in Kyokushin All Japan Tournaments, going on to beat Michel Wedel, Gerard Gordeau

Gerard Gordeau

Gerard Gordeau is a retired Dutch savateur, karateka, and mixed martial artist. He is the 1991 World Champion Savate and holder of the Dutch Champion Kyokushin Karate title for 8 consecutive years, but foremost known internationally for his fight against Teila Tuli in the first televised Ultimate...

 and Michael Thompson. He fought and lost to Andy Hug

Andy Hug

Andy Hug was a Swiss Seidokaikan and Kyokushin karateka and kickboxer from Wohlen. Hug was the K-1 World Grand Prix 1996 champion and runner up in 1997 and 1998.-Biography and career:...

 however Hug was unable to walk after the fight.

In 1990 he won a gold medal in the 22nd All Japan Kyokushin Tournament. and in 1991 he placed second in the 5th World Karate Tournament.

He is the shihan

Shihan

- Title of "Master" is a Japanese Honorific Title, Expert License Certification used in Japanese martial arts for Master Level Instructors. The award of the Expert License Certification is if designated by the qualification by virtue of endorsement by the [A] Association of Chief Instructors or [B]...

of Kyokushin Kaikan Masuda Dojo. In 2007 Masuda published the book "Freestyle Karate" and in 2009 he published "Masuda Akira - Go, Budojin toshite Ikiru".