Damn im surprised it wasnt officially published on any platforms! Thanks for the song, its my favorite!

Tatsuro Yamashita - The Door into Summer

1999 Osaka Live

The Delfonics Cover
1992.03.15 Nakano Sunplaza 
JOYに入っているのより少しだけ出来が良いそう

I only edit some audios, credits in the description.