Stickers/seals/stamps became popular in the 1970s likely due to the success of the Panini brand from Italy.  The sumo stamp set was among numerous different subjects produced by Kodansha NST (more on Kodansha later) during this time including baseball, animals, trains, tv shows and even Guiness Book of Records.  All sets came with an album that cost 200円 and with packs that came 8 stamps to a pack for 50円 a pack.  I also have several "sample" packs that were given to stores to be used as promotional giveaways and the store owner had the opportunity to write in his business's name on the back of the packs to guide kids, and their money, his way.  These came 3 stamps to a pack.  The stamps are approximately 2" x 3".

  The sumo set I own has been glued to the pages of an album aside from the handful of loose packs I've picked up along the way. Those will stay sealed....for now at least.  The front has a nice shot of Ozeki Takanohana who was extremely popular in 1976 and used on a lot of the packaging items(see below).

As mentioned in numerous blogs the stamps were intended to be glued into the album into their corresponding slot/area.  There is a little strip along the top where the glue was to be applied and so you could still flip the stamp up and read the tidbit of trivia and information that was usually printed there (see below with several open slots).

The back of the album had an order form for kids to order any single stamp for 7円 as well as a checklist as seen below to keep track of the individual cards they had.  This last page also explains the process for turning in 168 of your doubles for a special present.  What that special present is, I am not sure, but will have to do more research on that.

Here are scans of the front and back of a regular and sample pack.

The auction I purchased also had a full size copy of a reproduction poster that would have hung in the window of the toy shop.  It's quite attactive and I only wish it was an actually original instead of a copy.


I was quite curious on the NST brand and did a 30 minutes search trying to research the company.  I came up empty handed and really started examining the album more for clues as well as look at other albums from the different subjects.  As it's written on everything, the sumo stamps (as well as baseball stamps) were manufactured under the supervision of Baseball Magazine Sha (SSM) and issued/published by Kondansha International NST Project Office.  Kondansha International was the English-language publishing house of Kondansha, but there are no clues to NST Kikakushitsu (Project Office).  So the chase was on and I went out and researched other kikakushitsu organizations.  It turns out all the references I found dealt with the publishing world in the form of "Modern Project Office", "Parenting Series Project Office", "Kobe City Project Office" and "Neko Project Office", etc....  All of these project offices released a distinct set of publications.  Clearly the NST Project Office had the authority to use their logo instead of Kodansha so my guess is NST was a division of Kondansha that was tasked to produce the whole series of stamp sets (approximately 15-20 by my estimate) during this era.  Likely NST stands for something like Nihon Stamp Team, Nihon STamp.  I'm hoping someone else will be able to weigh in on this as well.