is a retired Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese judo

Judo

is a modern martial art and combat sport created in Japan in 1882 by Jigoro Kano. Its most prominent feature is its competitive element, where the object is to either throw or takedown one's opponent to the ground, immobilize or otherwise subdue one's opponent with a grappling maneuver, or force an...

ka.

Kase is from Sumida, Tokyo

Sumida, Tokyo

is one of the 23 special wards of Tokyo, Japan. It calls itself Sumida City in English.As of 2008, the ward has an estimated population of 240,296 and a density of 17,480 persons per km²...

 and began judo at Kodokan

Kodokan

, or the Kodokan Institute, is the headquarters of the worldwide judo community. Literally, kō means "to lecture" or "to spread information," dō means "the way," and kan is "a public building or hall," together translating roughly as "a place for the study or promotion of the way." The Kodokan was...

 at the age of a 4th grader. He belonged to Keiyo Gas Co.,Ltd after graduation from Meiji University

Meiji University

is a private university in Tokyo and Kawasaki, founded in 1881 by three lawyers of the Meiji era, Kishimoto Tatsuo, Miyagi Kōzō, and Yashiro Misao. It is one of the largest and most prestigious Japanese universities in Tokyo, Japan....

 in 1977.

In 1981, He won a silver medal at the World Championships

World Judo Championships

The World Judo Championships are the highest level of international judo competition, along with the Olympic judo competition. The championships are held once every year by the International Judo Federation, and qualified judoka compete in their respective categories as representatives of their...

 held in Maastricht

Maastricht

Maastricht is situated on both sides of the Meuse river in the south-eastern part of the Netherlands, on the Belgian border and near the German border...

. He also participated All-Japan Championships

All-Japan Judo Championships

is a judo tournament held every year in Japan. The men's tournament is held in Nippon Budokan on April 29 and the women's tournament is held in Yokohama Cultural Gymnasium in April. The Kodokan and All-Japan Judo Federation sponsor the championship....

 5 times from 1977 to 1985.

As of 2010, Kase coaches judo at Keiyo Gas.

Achievements

• 1976 - Kodokan Cup (-78 kg) 2nd

- All-Japan University Championships (-78 kg) 1st

• 1979 - All-Japan Selected Championships (-78 kg) 3rd

- Kodokan Cup (-60 kg) 2nd

• 1980 - Pacific Rim Championships (-78 kg) 1st

- All-Japan Selected Championships (-78 kg) 3rd

- Kodokan Cup (-60 kg) 3rd

• 1981 - World Championships
  World Judo Championships
  The World Judo Championships are the highest level of international judo competition, along with the Olympic judo competition. The championships are held once every year by the International Judo Federation, and qualified judoka compete in their respective categories as representatives of their...
  
  (-78 kg) 2nd

- Pacific Rim Championships (-78 kg) 1st

- All-Japan Selected Championships (-78 kg) 1st

- Kodokan Cup (-60 kg) 3rd

• 1983 - All-Japan Selected Championships (-78 kg) 2nd

- Kodokan Cup (-60 kg) 2nd

• 1984 - All-Japan Selected Championships (-78 kg) 3rd

- Kodokan Cup (-60 kg) 1st