There's been some interesting interviews with Japanese developers posted at shmuplations.com recently.  Most of these are from the '90s -- interview with 
SFII director/designer Akira Nishitani (
http://shmuplations.com/streetfighterii/), Taito's 
Gun Frontier designer/planner Takatsuna Senba (
http://shmuplations.com/gunfrontier2/), Data East round table interview touching on 
Karnov (
http://shmuplations.com/dataeast/), tiny piece on 
Star Fox with Shigeru Miyamoto (
http://shmuplations.com/starfox/), and a 1985 interview with Yukio Kaneoka who created the 
 Jr.
 Jr. game music (
http://shmuplations.com/kaneoka/).