Ah....we have a similar taste in music. In Japan jazz fusion is very popular. I am also a fan of Ritenour, Metheny and Larry Carlton, Crusaders and early Benson. I have most of Joe Sample's solo albums and I liked Carlton in his earlier years, do you remember the red double album with Larry Carlton playing with the Crusaders live? He played an excellent solo on the Carol King song "So Far Away". I play guitar by the way, so most of the bands I see in Japan are jazz fusion bands, particularly with excellent guitarists.
The Japanese guitarists that I mostly see are Yuya Komoguchi and Akira Wada. Yuya Komoguchi is the current guitarist with the famous band Trix but also plays with bands Nikamoto and also performs along with other musicians sort of like the way the American session musicians record or play live with each other. Akira Wada is the founder of the band Prism and often played for the late Naoya Matsuoka since the 70's but does many live performances with various other musicians or solo with a backup recording. Akira is 60 years old whereas Yuya is about 29 years old and a prodigy as far as I am concerned His styles are jazz, rock, pop, blues, but he shines most in jazz. You can check out these names on Youtube.
We also saw Prism and Casiopea perform live last November at the Roppongi EX-Theater in Tokyo although that is a big venue. However, one of the most famous places for live jazz music is "Blues Alley" in Tokyo which is a medium to small venue. Many of the best jazz musicians play here.
Another venue we often go to is AfterBeat in the town if Mishima, but you need to take the bullet train out of Tokyo to get there. The owner is Mr. Kaz and a close friend but he doesn't speak English. They have some great jazz fusion bands playing there, nice food too.
There is a great venue in Yokohama called "Stormy Monday", a pub that seats perhaps 20 people at the most. Both these artists often perform here. The owner of the place is called Miss Kazuki and she is a friend of ours and speaks English. The place is about 5 minutes walk from the Yokohama Baseball Stadium. Yokohama is about 45 minutes train ride from Tokyo Main Station.
There is a site that lists many of the jazz cafes in Tokyo called http://whereintokyo.com/dbinx/jazz.html although I haven't been to any of these.
Basically if you search any of the above venues on google you may get the English translation.
By the way, Yuya Komoguchi is an incredible guitarist, one that I think can play everything from Ritenour to Carlton to Holdsworth to Satriani. His playing is impressive and he plays with soul, remarkable for someone so young. If you go to Youtube and search a video called "TRIX LIVE 2011 at THE BOTTOM LINE [IMPACT] " and then forward it to 38.33 minutes into the video he plays a wonderful solo on the song Jasmine. I am sure you'll become a fan. I actually have some live recordings from a live performance passed to me by Mr. Saijo, the President of Saijo guitars in Japan who is a good friend and was recorded at a performance we both went to, so if you like his music let me know and perhaps I can email one or two goodies to you.
I'll ask my wife to check if Akira or Yuya are performing around the end of this month/early July and get back to you as she normally knows what they are up to.
Regards,
Hansson