Ai Sugiyama lost to her Swedish opponent in the day's first Fed Cup singles match on Sunday, but Shinobu Asagoe prevailed for Japan's third victory in the World Group playoff against Sweden.
Asagoe's 6-3, 7-6 (8-6) win against Hanna Nooni at Gifu Memorial Center secured a berth in next year's Fed Cup for Japan, where it will be making its first appearance in the World Group of the 16-nation women's competition since 2001.
Earlier, Sugiyama, now ranked 11th in the world, fell to world No. 137 Sofia Arvidsson 7-5, 6-1.
Japan, managed by Takeshi Koura and representing the Asia-Oceania zone, concluded the two-day tournament with a 4-1 record after the tandem pair of Akiko Morigami and Saori Obata defeated Arvidsson and Nooni 6-3, 6-2 in the afternoon doubles match.