Crafting the Sprite Sakura Blade and Yakibatsuchi
From Unfinished Sprite Blade to Sprite Sakura Blade
The Sprite Sakura Blade is the end of the sprite weapon line. It is reached through smithing_transform, starting from the Unfinished Sprite Blade. The Unfinished Sprite Blade is itself a smithing_transform output, so you will run the smithing process at least twice along this chain.
First produce the Unfinished Sprite Blade from its base and addition items. Then feed that Unfinished Sprite Blade plus the required addition into smithing again to receive the Sprite Sakura Blade.
Where Yakibatsuchi Fits
Yakibatsuchi is one of the mod's registered items and appears in the smithing_transform recipe set. Treat it as a required addition or intermediate for the sprite line rather than a standalone tool. If a smithing step refuses your input, the missing piece is usually Yakibatsuchi or Spirit Sakura Steel.
Because there are five smithing_transform recipes total, the sprite chain and the iron chain together account for most of them. Keep your Researching Table nearby while you work, and store Unfinished Sprite Blades separately from finished Sprite Sakura Blades so the two do not get mixed up at the smithing station.