歌バカ人生に「この人」あり！～25人が語る平井 堅の25周年 Part 2
To celebrate Ken's 25th anniversary , writer Shimada Satoshi whom has traced Ken's music career from the beginning until now interviewed a total of 25 different people which they will share their thoughts about Ken
1 interview per month will be released via the special 25th anniversary website until next May
2nd person in the list is Sato Yasuhiro , who also works for Sony & he also manages Kubota Toshinobu
https://www.kh25th.net/interview/detail02/
http://www.sonymusic.co.jp/artist/KenHirai/info/520016
Talking about Kubota Toshinobu , I'm surprised he hasn't work with Ken on something yet , it will be interesting if they put out a duet together