Believing something because you want it to be true, not because it is realistic.
現実的ではなく、そうであってほしいから何かを信じること。 (Genjitsuteki de wa naku, sou de atte hoshii kara nanika o shinjiru koto)
"Believing you'll win the lottery is just wishful thinking."
"宝くじに当たると思うのは、ただのウィッシュフル シンキングです。" (Takarakuji ni ataru to omou no wa, tada no wishful thinking desu)
to make someone responsible for their actions
to accept something unpleasant and continue
to be in the same difficult situation
to date someone regularly and exclusively
to cause someone to feel sympathy or emotion
to continue believing in your goals even when it's hard