JK 27: 1931-32 Big Six U. Karuta

Kiyoichi Igawa - added 12/25/25

Shigeru Mizuhara - added 12/25/25

JF 72: 1950-52 Lotte Gum

Aota - added 12/21/25

Similar to JBR 197: 1951 Shiori (Bookmark) Cards

Betto - added 12/21/25

JRM 69: c. 1930 Giant Round Menko - but small

Meiji University (similar to JRM 69...but smaller) - added 12/16/25

JF 26: 1960 Maruto Gum - Sort of (new UNC variety)

Nagashima - not sure what set this is, but seems to be related to JF26 - added 12/16/25

JCM 66b: 1957 Maruya B&W Chain Menko Type 1

I have found a Nagashima rookie card from this set, which would indicate that it actually came out in 1958 (when he started playing). I'm including here my uncatalogued cards in hopes of eventually getting more information about this set in the guide.
Nagashima

Dobashi

Horiuchi

Uchi

Wada

Katsuragi

Namiki

Komatsu

Balbon

Honyashiki

Tada

Kawamura

Sekiguchi

Toyoda

Kageyama - added 6/9/24

Morinaga - added 10/1/24

Kajiki - added 10/1/24

Mori - added 10/1/24

Kono - added 10/1/24

Sato - added 10/1/24

Koyama - added 10/1/24

Ladra - added 10/1/24

Ishikawa - added 10/1/24

Sasaki - added 10/1/24

Minagawa - added 10/1/24

Nagashima #2 - added 11/29/25

Nagashima #3 - added 11/29/25

JRM uncatalogued Flying Menko

1.25" diameter

Fujimoto - added 11/23/25

Betto - added 11/23/25

Kawakami - added 11/23/25

Aota - 11/23/25