1.
Japanese pepper, sansho
A spice from the prickly ash tree native to Japan, known for its sharp, tingling flavor. Used as a condiment and seasoning in traditional Japanese cuisine.
Common patterns
山 (mountain) + 椒 (pepper).
Usage
山椒 is distinct from 胡椒 (black/white pepper). It has a unique numbing, citrusy pungency rather than simple heat. Ground 山椒 (粉山椒) is the classic condiment for 鰻 (grilled eel). The young leaves (木の芽) are used as a garnish in spring dishes. Related to but distinct from 花椒 (Sichuan pepper), which is used in Chinese cuisine.
The proverb 山椒は小粒でもぴりりと辛い ("sansho is pungent even in small grains") means that small things can pack a punch.