It is a little difficult to make yourself a bean jam used in wagashi.
和菓子=Wagashi=Traditional sweets of Japan
漉し餡=Koshian=strained sweet red beans
The supermarket has been sold Tsubuan and bean jam.
Other There is also a powder dry bean paste.
Dry bean paste is what was the bean jam of prior to the addition of sugar to the powder.
It is applied to the fire by adding water and sugar in a dry bean paste when using.