NPB 外国球员遭受的歧视 - 跨文化共存的阴暗面
每年都有许多外国球员来到 NPB，但在待遇方面一直存在歧视性问题。
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NPB的种族与国籍歧视 - 在日韩裔球员走过的荆棘之路
Throughout NPB history, Zainichi Korean players have played while facing discrimination and prejudice.
女子职业棒球的挫折与排斥历史 - 女性为何被球界拒之门外
The de facto exclusion of women from NPB: high school baseball's female player ban, the absence of female umpires, and gender barriers in Japanese professional baseball.