Ohagi and Botamochi: Japan's Equinox Holiday, Ohigan
Ohagi looks like a single, simple sweet: glutinous rice, partly mashed, formed into a ball and coated in sweet anko, one stop on our full season-by-season wagashi guide. What’s actually interesting about it is the name attached to that description changes depending on the season, and the reason traces back to a Buddhist holiday most people outside Japan have never heard of.
One sweet, two flower names
In autumn, this sweet is called ohagi, named for hagi, the bush clover that blooms that season. In spring, the identical sweet is called botamochi, named for botan, the peony that blooms then. Neither name describes a difference in the sweet itself; both are the same rice-and-bean-paste combination, simply borrowing the name of whatever flower happens to be in season when it’s eaten.
Ohigan: the holiday behind the sweet
Both ohagi and botamochi are traditionally eaten during ohigan, a Buddhist observance held during the week surrounding the spring and autumn equinoxes, when day and night are of equal length. “Higan” translates roughly to “the other shore,” from a Sanskrit Buddhist term for reaching enlightenment, and the equinox’s balance of day and night is traditionally seen as the moment when this world and the next sit closest together. Families traditionally visit and clean ancestral graves during ohigan, and Japan is the only country where Buddhist observances are specifically timed around the equinoxes this way. Offering ohagi or botamochi, whichever the season calls for, is part of that same practice, and the two seasonal meanings differ slightly too: spring’s botamochi is traditionally framed as a wish for fertility, while autumn’s ohagi is framed as gratitude for the season’s harvest.
A second theory about the filling, not the region
Our guide to koshian vs. tsubuan covers a well-documented regional pattern, Kanto leaning koshian and Kansai leaning tsubuan. Ohagi and botamochi carry a separate, non-regional explanation for the same filling split: azuki beans are harvested in autumn, so autumn ohagi traditionally used freshly harvested beans with still-soft skins, left whole as tsubuan, while spring’s botamochi used beans that had been stored since the previous autumn, their skins toughened by then, better suited to straining into smooth koshian. It’s a genuinely different mechanism from the regional pattern, tied to harvest timing rather than geography, and both explanations circulate for the same koshian/tsubuan split depending on which sweet is being discussed.
Frequently asked questions
What's the difference between ohagi and botamochi?
None in the sweet itself. Both are glutinous rice coated in sweet bean paste; ohagi is the autumn name, from hagi (bush clover), and botamochi is the spring name, from botan (peony). Today most people just say ohagi regardless of season.
What is ohigan?
A Buddhist observance held during the week surrounding the spring and autumn equinoxes. "Higan" means "the other shore," referencing the journey toward enlightenment, and the equinox's balanced day and night is traditionally seen as when this world sits closest to the next. Families visit and clean ancestral graves during this period.
Why do some sources say ohagi uses tsubuan and botamochi uses koshian?
A harvest-timing explanation, separate from the regional Kanto/Kansai pattern covered in our koshian vs. tsubuan guide: freshly harvested autumn azuki had soft skins, suited to whole tsubuan, while spring beans stored since the prior autumn had toughened skins, better suited to strained koshian.
Is ohigan unique to Japan?
Yes, in the specific sense that Japan is the only country where Buddhist observances are held specifically timed around the spring and autumn equinoxes this way.
The short version
Ohagi and botamochi are the same rice-and-bean-paste sweet under two flower-borrowed names, hagi for autumn and botan for spring, though modern usage has mostly collapsed into just “ohagi” year-round. Both are traditionally offered during ohigan, a Buddhist equinox observance centered on ancestral grave visits and unique to Japan in its equinox timing. A separate, harvest-timing explanation, not the same as the regional pattern covered elsewhere on this site, also connects the sweet’s traditional filling choice, tsubuan in autumn and koshian in spring, to when the azuki beans themselves were actually harvested.