小泉首相が「憲法違反だから靖国神社参拝しちゃいかんという人がいます」と語った。

「」。

Prime Minister Koizumi stated, 'There are people who say you can't visit Yasukuni Shrine because it's a constitutional violation.'

Literal

Koizumi prime-minister [subject-が] 'constitution-violation is-[because-だから] Yasukuni-Shrine visit-[must-not-しちゃいかん][called-という] people [subject-が] exist-[polite-います]' [quotative-と] said.

Direct-speech political reporting. しちゃいかん is a casual/rough contraction of しては+いけない/いかん — ~ては+いけない ('must not X') abbreviates to ~ちゃいけない in casual speech, and いかん is the slightly old-fashioned or masculine-sounding variant of いけない. This reflects the PM's colloquial quoted speech within a news report. 憲法違反 'constitutional violation.' ~という人 'people who say X.'