The standard generalization concerning the traditional EPP (Extended projection principle) is that Spec, TP must always be filled by some element, even when no apparent semantic or Case-related reason is detected. Recent research reveals that EPP effects are observed in a language, like Japanese, that lacks expletive subjects (Kishimoto 2001, Miyagawa 2001, Miyagawa & Arikawa 2007). Hirata (2006b) further demonstrates that the alleged EPP effects in the language do not disappear in tenseless conjuncts in predicate coordination structures, from which it is claimed that the EPP in Japanese works in a projection under TP. The present article yields additional support for this claim by examining an example of Case alternation in Japanese. Evidence is provided that the tenseless coordination construction at issue cannot be analyzed as a case of TP coordination and thus that EPP effects can definitely be detected under TP.