It could mean 'tradition', 'origin', 'orphan' among many others.
[Japanese words between 1 and 3 syllables long can usually have a wide variety of meanings, depending on how they are written (kanji). Without the context or kanji provided I can't provide you with your exact answer.]
It means 'brat'. I think it was supposed to be 'kozou', but I'm not so sure.
It's a ships name - most, if not all Japanese vessels end with the suffix maru.
孤児の家族 Koji no kazoku
Koji
Japanese musician Koji Kikkawa is 52 years old (birthdate: August 18, 1965).
Koji Yusa
Koji Kondo is a Japanese composer and sound director for video games. He is most known for his compositions for the popular Super Mario Bros and Legend of Zelda video games.
Jason Anthony griffith (English) koji yusa (Japanese)
上原浩治 this is said "Uehara kōji"
Koji Victor Ujimoto has written: 'Post-war Japanese immigrants in Canada' -- subject(s): Microfilm of typescript. Ottawa: National Library of Canada, 1973. - 1 reel, 35 mm. - (Canadian theses on microfilm, no. 15158)Japanese in Canada
Koji Kamoji has written: 'Koji Kamoji'
Masatsugu Inoue has written: 'Yamato koji' -- subject(s): Art, Art, Buddhist, Art, Japanese, Buddhist Art, History, Japanese Art
I personally couldn't get Koji Kondo to compose a song for you but you could try writing a letter(and getting it translated into Japanese) to him. The chances of actually getting him to compose something for you is very slim but it can't hurt to try.