I've known Yoshioka-san, owner and sole staff at Cafe Beulmans for several years now, since before he took over the cafe in mid-2012.
Cafe Ellington was opened in June 2012 by the warm and chatty Onodera-san, a retired apparel merchant.
Misty is a small cafe located in the heart of Asagaya's old style "shotengai" (shopping street).
Jazz Tweeter was opened a couple of years ago by long-time hotel restaurant chef Ishizuka-san.
Fat Mama is named after the great Herbie Hancock track from his album "Fat Albert Rotunda".
Rompercicci is a new jazz cafe/bar just a short ten-minute walk from Nakano Station. It's a bright, warm space with superb speakers and an extensive vinyl collection covering all genres.
Nadja is a great little cafe in Koenji that stands out for its tasty lunch menu, especially the Malaysian style curry.
Kissa Seikatsu (喫茶生活 "Cafe Lifestyle") is a gem of a place a few mins walk from Higashi-Koenji station on the Marunouchi Subway Line.
Jazz Olympus was opened by the very friendly Komatsu-san in 2009. It's a sleek cafe/bar that is already well known in the area for it's lunch-time menu (rare is the jazz cafe with good food!).
Small Hours is a new cafe/bar located in the back streets between Ochanomizu, Jimbocho and Suidobashi stations.