Impact of Long-Distance Swimming “Enei” on Japanese University Students’ Grit 論文 Hiroya Endo・Yoji Omoto・Kenryu Aoyagi・Koichiro Oka・Yoshinori Shiota ·2019-12-16 ·『Advances in Physical Education』 10(01) pp. 1-9 doi:10.4236/ape.2020.101001