JRM 56: 1947 Circle K

Shiraki (unc)

Kajioka (unc)

JDM 9: 1948 Team Nickname at Top

Here's one that isn't in the catalogue yet.
Morishita (UNC)

JCM 32d: 1959 Marumatsu Scoreboard back, Front Border

Hasagewa

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

JCM 175: c.1947 Baseball Tournament

THe catalogue/guide only lists the three named cards in this set (Oshita/Wakabayashi/Sugiura), but mentions that there are a number of generic cards. Below is one of the unlisted generic cards:

JDM: Uncatalogued #27 - Airplane #11

This airplane has a blank back.

JDM: Uncatalogued #26 - Airplane #10

Here's another set, with a cross hatching pattern on the back.

JDM: Uncatalogued #25 - Airplane #9

This set is similar to another, but there is less writing on the back of the wings of the planes. Here are some I found online in an auction listing:

JDM: Uncatalogued #24 - Airplane #8

This one is similar to others, but there's less writing on the backside. This one might also be of the same set, but there's no writing on the backside besides the menko number.

JDM: Uncatalogued #23 - c.1950 Airplane #7

Here's another unique airplane shape.The design is similar to another, but there is a team name on the top of the wings, and a name on the back of the wings.

JDM: Uncatalogued #22 - Airplane #6

This looks similar to another type, but there's a number on the top of the airplane.

JDM: Uncatalogued #21 c. 1948 Airplane #5

This one is similar to others, but there is more writing on the backside, and the diecut shape is different.

JDM: Uncatalogued #20 - c. 1949 Airplane #4

This set is supposed to be a diecut airplane, but it isn't as realistic as others. Here's some I found online. This set has a blank back.

JDM: Uncatalogued #19 - c. 1949 Airplane #3

Here's another airplane set. This time, on the backside there is just the image of a plane and a menko number. Here are some I've found online:

JDM: Uncatalogued #18 - c. 1949 Airplane #2

Here's another uncatalogued diecut airplane set that I saw in an auction.

JDM: Uncatalogued #17 - Diecut Airplane

Here's a diecut airplane that hasn't been catalogued yet, though it was shared online.

JCM 156: c.1949 Japanese Currency Back

Here are some uncatalogued cards from this set that I've found for sale in online auctions.

JCM: Uncatalogued #28

This is a set I saw in an auction online - while the fronts are generic cartoons, they do list specific player names. The backs have a large baseball with a team name on front.

JCM: Uncatalogued #27 - Trophy Back #5

Here's another version of an uncatalogued card with a trophy back. This one was seen in an auction that described it as being a Keiu U player.

JCM: Uncatalogued #26 - c1926

This set seems to feature a Keio vs. Wadeda U game, possibly from 1925, and a Championship ceremony for Shinko high schol. Here's what I believe is a complete set, pulled from images of an uncut sheet that sold in an auction online.