Nakagaichi was a top player for the Japanese men's national volleyball team in the 1990s.

[1] Nakagaichi played at the 1992 Summer Olympics in Barcelona,[2] and he also competed at the 1998 FIVB World Championship in Japan.

[4][5] In November 2016, shortly after an announcement of becoming Japan's men's national team head coach, Nakagaichi was suspected of negligence in allegedly hitting a 41-year-old traffic guard while driving on the Chugoku Expressway in the city of Shobara, Hiroshima prefecture, on 9 November.

[6] In 2017, the Japan Volleyball Association was considering a temporary replacement for Nakagaichi after he stepped back from the role following this incident.

The association retained him as coach under the expectation that a criminal charge would be handed down within three months.