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)
Isn’t the JCP Anti-China? (Edit: Yep https://www.scmp.com/week-asia/politics/article/3139887/japanese-communist-party-snubs-chinas-communist-party-centenary https://asia.nikkei.com/Politics/Inside-Japanese-politics/Japanese-Communist-Party-s-long-goodbye-to-its-China-comrades)