Hikaru Midorikawa was 34 in Kill Bill: Vol. 1 when he played the character 'Pretty Riki (anime sequence) (voice)'.
That was over 21 years ago in 2003.
Today he is 56, and has starred in 70 movies in total, 37 of those since Kill Bill: Vol. 1 was released.
In Kill Bill: Vol. 1, I think Hikaru Midorikawa looks: