Jazz guitarist Masayoshi Takanaka has been around Japan's music scene for a long time, and he's still going strong. His old-school "cool jazz"-style music brings to mind a lazy day on the beach or in the backyard, lounging with friends and family. Very mellow stuff.
Here are a couple of his videos I found on YouTube.
"Blue Lagoon" - In concert
"Ready to Fly" - Live, with violinist Ikuko Kawai)
"Nagisa Moderato" - In concert