How do you say forefinger in Japanese?
— 人差し指 (ひとさしゆび, hitosashiyubi)

Related synonyms for forefinger in Japanese
index索引 (sakuin), インデックス (indekkusu), 表題 (hyōdai), 指数 (shisū), 指標 (shihyō), 総目録 (sōmokuroku)
Generic synonyms for forefinger in Japanese
finger指 (ゆび, yubí)