Airium Lounge sits on the 3rd floor of Niigata’s single passenger terminal before security, with a runway view marketed by the airport. Hours are listed as 07:10–19:20 with last call 19:00 (subject to flight status). Access is either eligible Japanese gold cards (2 hours free; overseas-issued cards typically excluded) or a paid walk-up of ¥1,000 excluding tax per person for 2 hours. There is no ANA Lounge, JAL Sakura Lounge, or Priority Pass product at KIJ on research day.