In the early 1960s, Nintendo was part of a three-company consortium that was called San'ō syokuhin (サンオー食品株式会社). The other two members in the consortium were the University of Kyoto and the Omikenshi Company.
Nintendo had set up this consortium as a response to the tremendous success of Cup Noodle, the instant noodle dish invented by the Japanese firm Nissin in 1958. The Nintendo led consortium's purpose was to take a piece of the growing market for convenience food. In order to do this, they developed a new product: instant rice. They would later also produce instant noodles (ramen).
The San.o products did not become a big success (lore has it that they did not taste very well) and because of the very nature of these perishable goods, very limited evidence of them remains today.
| Original envelop that was used to send the sweepstake prize |
Recently I did find one of their sales promotions. This promotion was an effort to boost sales for San.o Popeye Ramen (ポパイ ラーメン). Apparently, a prize draw was held for customers of this brand of ramen, with the lucky winners receiving a pack of playing cards.
With Nintendo involvement in the San.o consortium, it was almost inevitable that the sales promotion would use one of Nintendo's own products, which at this time were still predominately playing cards.

