, a combination of the kanji for celebration "su" (寿) and sweet "ama" (甘) is a Japanese sweet

Wagashi

is a traditional Japanese confectionery which is often served with tea, especially the types made of mochi, azuki bean paste, and fruits.Wagashi is typically made from natural ingredients...

 made of non-glutinous rice flour, hot water, and sugar characterized by its red food dye. It is dyed red, because red and white symbolize celebration in Japanese tradition. It is kneaded and then optionally shaped by a sushi rolling mat (sudare), which gives the final product a textured, slightly bumpy surface.

Suama is similar to, but not the same as, other rice-based Japanese snacks mochi

Mochi

Mochi is a Japanese rice cake made of glutinous rice pounded into paste and molded into shape. In Japan it is traditionally made in a ceremony called mochitsuki. While also eaten year-round, mochi is a traditional food for the Japanese New Year and is commonly sold and eaten during that time...

and uirō

Uiro

is a traditional Japanese steamed cake made of rice flour and sugar. It is chewy, similar to mochi, and subtly sweet. Flavors, among others, include azuki bean paste, green tea , yuzu, strawberry and chestnut...

. Mochi uses glutinous rice flour; while uirō is not kneaded, but rather mixed, placed in a mold, and steamed.