Album/Single: ETERNAL S Artist: SS301 / Double S 301 Review by: Mariëlle. While SS301 (Double S 3 oh 1) are Korean, and not Japanese, JNL has decided to review their Japanese album. The members of SS301, whom are a sub-unit to SS501, were popular in Japan for years, but have only recently returned as a … More Special Review: SS301 – ETERNAL S