Seiya Matsui is written 마쓰이 세이야 in Korean (Hangul). The spelling follows the actual pronunciation of Seiya Matsui, based on Korea's standard 외래어 표기법 (foreign-word transcription rules). Tap below to hear it spoken, see Seiya Matsui in 20+ Korean fonts, or make a shareable Hangul name card.
Seiya Matsui in Korean (Hangul) is written 마쓰이 세이야. The spelling is based on the actual pronunciation of Seiya Matsui, following Korea's official 외래어 표기법 (foreign-word transcription) rules.
마쓰이 세이야 sounds close to the original Seiya Matsui (/seija matsɯi/). You can hear it spoken aloud and copy the spelling at myhangulname.com.
Yes — 마쓰이 세이야 is the recommended Korean spelling for Seiya Matsui. Minor variants may exist depending on pronunciation.