Possible Clues:

• Sensei's school
• Perform short run in place of karate
• Martial arts place
• Place where judo or karate, etc are taught or practised
• Place to get one's kicks?
• Judo room
• Place to learn jiujitsu
• Where Japanese train departs and heads for Osaka, journeying onwards
• Judoka's school
• Room where martial arts are practised