- 存在【そんざい】 - existence, being, presence 
- 現在【げんざい】 - the present, present time, now, as of, present tense, this world, this life, to actually exist, to exist right now, to exist right in front of one 
- 不在【ふざい】 - absence, disregard, indifference 
- 滞在【たいざい】 - stay, sojourn 
- 実在【じつざい】 - actual existence, real existence, existing in real life 
- 在日【ざいにち】 - resident in Japan (of a foreigner), situated in Japan (e.g. of an embassy), Zainichi, Zainichi Korean, North or South Korean national with permanent residency in Japan (who came to the country before 1945, or a descendant of such a person) 
- 潜在【せんざい】 - potentiality, dormancy, latency 
- 在学【ざいがく】 - attending (school, college, etc.), being enrolled, being a student 
- 在留【ざいりゅう】 - residing (esp. abroad), staying, living 
- 在籍【ざいせき】 - being enrolled (at a school), being registered, being a member (of a team, organization, etc.) 
- 在住【ざいじゅう】 - residing, living, dwelling 
- 在庫【ざいこ】 - stock, inventory 
- 在りし日【ありしひ】 - past days, bygone days, days of yore, the olden days, while still alive, during one's lifetime 
- 在宅【ざいたく】 - being at home, being in 
- 駐在【ちゅうざい】 - residence, stay, (job) posting, being stationed (overseas, etc.), residential police box, residential police box officer 
- 在任【ざいにん】 - being in office 
- 所在【しょざい】 - whereabouts, place where one is, position, location 
- 在来【ざいらい】 - pre-existing, already there, conventional 
- 自在【じざい】 - being able to do as one pleases, doing at will, pothook 
- 在京【ざいきょう】 - being in the capital (i.e. Tokyo, or formerly Kyoto)