personal grudge

Kyūjitai form of 私鉄 (“private railway”)

性旭: a male given name

北極: North Pole

南極: south pole / 難局: crisis / 難曲: difficult musical piece

南極点: south pole

電極: electrode

結局: after all

大局: general situation; the whole point, the big picture / 対局: a game (of shogi, go, chess, etc.) / 対極: antipodes; other (opposite) extreme; opposite; antithesis

本曲: (music) basic musical pieces for the shakuhachi flute, shakuhachi music or tune / 本局: main office