Azuki (Adzuki Beans)

Japanese azuki has a sophisticated cultivar landscape with distinct OEM positioning: (1) Erimo-shozu (エリモ小豆) — the Hokkaido volume cultivar, balanced size and flavor, the workhorse for general anko production. Cost-effective and supply-stable. (2) Kitano-otome (きたのおとめ) — large-grain Hokkaido cultivar, holds shape well in tsubu-an applications. Good for visible-grain wagashi (tsubu-an manju, sekihan). (3) Shumari (しゅまり) — Hokkaido premium with deep color and pronounced flavor. Used by premium wagashi makers for flagship products. (4) Toyomi (とよみ) — modern Hokkaido cultivar with high-yield, balanced flavor. Growing share in commercial production. (5) Tamba-dainagon (丹波大納言, Kyoto Tamba — regional brand cultivar, not 農林水産省 GI-registered) — the most prestigious premium cultivar, distinctively elongated grain (vs. typical round shape), rich aromatic flavor, deep color. Used in highest-end Kyoto wagashi (top-tier Toraya yokan, Tora-ya monaka, Demachi-Futaba mame-mochi). Pricing 3-5× standard azuki. Annual production is small (premium specialty). For OEM positioning: Erimo-shozu for cost-effective volume anko and standard wagashi; Kitano-otome for tsubu-an and visible-grain applications; Shumari for premium-positioned products with deep flavor character; Toyomi for modern commercial; Tamba-dainagon exclusively for ultra-premium wagashi and gift retail. Cultivar disclosure on retail labels is increasingly consumer expectation in premium category. Substituting Erimo-shozu for Tamba-dainagon while marketing as Tamba-dainagon would be a serious consumer protection violation.

These three anko forms are distinct products serving specific wagashi applications: (1) Tsubu-an (粒あん, whole-bean paste) — beans cooked and lightly mashed, retaining individual bean integrity. Chunky texture with visible bean shapes. Suited to: dorayaki, ohagi, sekihan-style applications, premium tsubu-an manju where bean visibility is desired. (2) Koshi-an (こしあん, smooth bean paste) — beans cooked, fully mashed, then passed through a sieve to remove bean skins. Smooth, fine texture. Suited to: classic manju (steamed buns), monaka filling, mizu-yokan, daifuku where smooth texture is desired. Production requires sieving step that creates more 'okara' waste, contributing to higher cost. (3) Tsubushi-an (つぶしあん, mashed bean paste) — beans cooked and mashed but skins retained (no sieving). Intermediate texture between tsubu and koshi. Suited to: kashiwa-mochi, sakura-mochi, casual dorayaki, products where some texture is desired without full chunkiness. For OEM positioning: clearly specify the anko form to match the wagashi application. Sugar level (typical 50-65% sugar to bean weight) should be specified. Domestic vs imported azuki origin should be disclosed. Premium positioning (Tamba-dainagon, Tokachi-Shumari) commands substantial pricing premium. Industrial anko production uses standardized recipes but customization for specific OEM wagashi applications is common.