Japanese Kashiwa Mochi and Seasonal Leaf-Wrapped Wagashi

Japan — Edo period (17th–18th century); associated with Kanto region originally, now nationwide on Kodomo no Hi (May 5)

Kashiwa mochi (柏餅) is the wagashi of Kodomo no Hi (Children's Day, May 5), made from mochi rice cake wrapped in a kashiwa (Japanese oak, Quercus dentata) leaf. The oak leaf does not fall until new leaves appear in spring, symbolising the continuity of the family line — a leaf that does not drop until its replacement arrives is a metaphor for unbroken succession. The mochi itself is made from jōshinko (non-glutinous rice flour) or a blend with glutinous rice flour, steamed, then moulded around a filling — typically koshi-an (smooth red bean paste), tsubu-an (chunky red bean), or shiroshiro-an (white bean paste with miso). The kashiwa leaf is traditionally not eaten — it imparts its subtle green, tannic aroma to the mochi through contact. Fresh leaves must be sourced in late April to early May and should be wilted briefly to become supple enough to fold without tearing. In modern wagashi-ya, preserved salt-packed kashiwa leaves are used year-round, though this lacks the aromatic intensity of fresh leaves.

Sweet, mildly aromatic with subtle green-tannic note from kashiwa leaf; smooth or chunky bean paste filling; textural contrast between supple mochi skin and dense filling