How do you say often in Japanese?
— よく (yoku); 度々 (たびたび, tabitabi); 頻繁 (ひんぱんに, hinpan-ni); しばしば (shibashiba)

Related synonyms for often in Japanese
much沢山 (たくさん, takusan); 多く (おおくの, ōkuno); 多い (おおい, ōi)