[quote=LammiKoi;85246]In Koihaku's "please comment on this nisai kohaku" thread, Stan states that tosai = 1 year old, nisai = 2 years old, etc...My question is, when does a koi become a nisai
-> 12 MONTH or sansai?
->24 MONTH If Koihaku's koi was born in April/May/June/July of 2005 then it should be starting its sansai year right now. Is that correct?
->YES
I kept on thinking that a tosai is a koi that has not reached its one year birthday. For example, if a koi was born in April of 2006, then it would be called a tosai until April 2007, at which time it would be called a nisai.
-> YES. Also, it can be called as a Ake Nisai (= still Tosai but soon Nisai) at the same time.
Or does it become a nisai starting January 1st of 2007 and sansai starting Jan 1st of 2008, and so forth?
-> NO. it's still Tosai and Nisai. In Japan, the breeding season starts in May. so, generally it changes before or after May. Bye 