Tony Dracon (canon, Partnership, Strange Bedfellows, The Longest Day part 1, The Waiting Game, The Darkest Hour part 2, Seeds of Change.) -- Thicker than Blood.
"Glasses" (canon, Partnership, Strange Bedfellows, The Longest Day part 1, The Waiting Game, Seeds of Change.) -- Thicker than Blood.
Pal Joey (Strange Bedfellows, The Longest Day part 1, The Waiting Game, Seeds of Change.) -- Thicker than Blood.
Big Mickey (referenced by Rita in "The Longest Day" part 1, and then taken and presumably killed by her and Rael in "The Waiting Game".)
Rosco (Big Mickey's henchman ) - The Waiting Game
Tomas Brode's Gang
(canon only) Golem, Turf
Club Lotus - upscale adult entertainment bar partonized by the Yakuza of Takeo Kimura's circle.
Mr. Mizuno - ("Tightrope") man who organized for Edgar the Bum to be the lookout, and supplied him with a cellphone and a number to call if things went bad. Isn't actually seen on-screen.
Takeo "Tommy" Kimura - Introduced in "Gaurdians". "Sacrifices", Parts 1 & 2 -- The Longest Day part 1, Seeds of Change.
Yoshi, Akira, Masao, Junzo - "Gaurdians" - associates/stooges of Takeo.
Shinji Kimura - Introduced in "Sacrifices" Part 1 - Yakuza man in to whose family Tommy has been adopted. A kashimoto-oyabun.
Toshito, Tsutomu, Motoki, Kenichi - "Sacrifices" Part 2 - work for/with Takeo.
Ryu - yet another associate of Takeo. "The Longest Day" part 1, Homecoming, Seeds of Change.
Fuyu - and another. "Homecoming", Seeds of Change.
Hikuru Inoue - "Homecoming" -- "Contingencies".
Kagemusha-san - "Homecoming"
Oroku-san - mentioned in "Seeds of Change".
Canon punk trio.
Al - one of three perpertrators in the hostage situation in "Hammer and Shield", he had the walkie-talkie.
Mitch - "Razor's Edge" - the man fitting the description of "tall, 6'2", blonde, has a tattoo on the left side of his neck." the perp that Broadway is looking for. he's supposedly dating a waitress at McCready's Tavern. Turns out *not* to be "Mr. Mercy".
"Mr. Mercy" - serial killer in "Razor's Edge"
Randy - actual thief and man who knifed the owner of a jewelry store in "The Witness".
Jo (female) and Roger - two people apparently breaking into a warehouse with Dracon's gang, in their pay but not actually part of the Mafia.
Edgar the bum - paid off by the Yakuza to act as lookout during a break-in. ("Tightrope") Apparently went into the witness protection program afterwards.
Ricky - "Razor's Edge" - snitch that Broadway questions over the tatoo-necked knifeman.