I know they have issues with their ideologies but the poster looks cool!
The text reads,
希望をあなたと共に; 日本共産党; Change裹金政治
Which roughly translates to,
‘Hope together with you; Nihon Kyōsantō; Change the gold-wrapped politics’.
(The last line is likely a reference to the financial scandals of the current ruling Liberal Democratic Party)
I don't like it, they look white and wear the most iconic USA outfit possible (white tee and denim trucker jacket), this combined with "Change" in English and scyscraper skyline just doesn't scream sovereinty to me.