Former All Black Jerry Collins had been struggling at his Japanese club and had been dropped for younger players who showed more promise.
A spokesman for Collins' former club Yamaha, Jin Hasegawa, told the Weekend Herald he didn't play many games this season due to weak form.
"His performance was not good and some of the other younger players were doing well so we wanted to give them a go instead," Mr Hasegawa said. Collins has been in police custody at Hamamatsu City since his arrest last weekend at a department store for possession of a knife with a 17cm blade.
He says it was for protection, but it is illegal to carry such knives in Japan and he is expected to remain in custody for several days.
Mr Hasegawa said Collins had been battling shoulder and back pain, but had shown no sign of being troubled before his contract with the club expired on February 28.