Konshuu-no-sensei - introduction. Useful materials and resources to study the Japanese language (t. Yojijukugo v3 2005-2007. 「あ」 合縁奇縁・相縁機縁 (あいえんきえん) [aienkien] (n) uncanny relationship formed by a quirk of fate; a couple strangely but happily united 相碁井目 (あいごせいもく) [aigoseimoku] (exp,n) In every game or play, differences in skill between individuals can be substantial.