His personal best jump was 17.15 metres, achieved in June 1986 in Tokyo.

[1] His oldest son Kohei Yamashita is also triple jumper and competed at the 2016 Olympic Games.

[2] His second son Jun Yamashita is a sprinter and competed at the 2019 World Championships.

[3] His daughter Toko Yamashita is also triple jumper and finished seventh at the 2020 Japanese Championships.

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