| 夏 | なつ | summer | n5 |
| 初夏 | しょか | early summer; fourth month of the lunar calendar | n2 |
| 夏休み | なつやすみ | summer vacation; summer holiday | n5 |
| 真夏 | まなつ | middle of summer; height of summer; midsummer | n1 |
| 夏季 | かき | summer season; summer; summertime | n1 |
| 夏期 | かき | summer term (e.g. school); summer period | n2 |
| 春夏秋冬 | しゅんかしゅうとう | spring, summer, autumn (fall) and winter; the four seasons | |
| 盛夏 | せいか | midsummer; height of summer | n2 |
| 夏場 | なつば | summertime; summer season | |
| 夏服 | なつふく | summer clothes; summer wear; summer uniform | |
| 夏山 | なつやま | summery mountain; mountain that is often climbed in summer | |
| 晩夏 | ばんか | late summer; sixth month of the lunar calendar | |
| 夏蜜柑 | なつみかん | natsumikan (Citrus natsudaidai); Japanese summer orange | |
| 夏至 | げし | summer solstice | n1 |
| 常夏 | とこなつ | everlasting summer | |
| 今夏 | こんか | this summer; next summer; last summer | |
| 夏めく | なつめく | to become summerly; to become like summer | |
| 夏場所 | なつばしょ | Summer Tournament (held in Tokyo in May) | |
| 夏向き | なつむき | for summer | |
| 夏野 | なつの | summer fields | |
| 昨夏 | さっか | last summer; summer of last year | n3 |
| 夏バテ | なつばて | suffering from summer heat; summer heat fatigue | |
| 夏物 | なつもの | summer clothing; summer wear; summer goods | |
| 立夏 | りっか | first day of summer (approx. May 6) | |
| 半夏生 | はんげしょう | Chinese lizard's tail (Saururus chinensis); 11th day after the summer solstice; last seed-sowing and rice-planting day | |
| 夏みかん | なつみかん | natsumikan (Citrus natsudaidai); Japanese summer orange | |
| 夏枯れ | なつがれ | summer slump | |
| 夏座敷 | なつざしき | room arranged for the summer (by removing screens and doors to improve air flow) | |
| 真夏日 | まなつび | day on which the temperature rises above 30°C | |
| 夏痩せ | なつやせ | losing weight over the summer | |
| 孟夏 | もうか | beginning of summer; fourth month of the lunar calendar | |
| 夏野菜 | なつやさい | summer vegetables | |
| 夏日 | かじつ | summer day | n2 |
| 夏蚕 | なつご | summer silkworms | |
| ひと夏 | ひとなつ | one summer | |
| 仲夏 | ちゅうか | midsummer; fifth month of the lunar calendar | |
| 消夏 | しょうか | summering; spending the summer | n2 |
| 夏もの | なつもの | summer clothing; summer wear; summer goods | |
| 夏安居 | げあんご | summer retreat where monks stay in the same place to study | |
| 夏やせ | なつやせ | losing weight over the summer | |
| 夏越し | なつごし | keeping over the summer | |
| 夏炉冬扇 | かろとうせん | summer fires and winter fans; useless things | |
| 季夏 | きか | end of summer; sixth month of the lunar calendar | |
| 半夏 | はんげ | crow dipper (Pinellia tuber); 11th day after the summer solstice; last seed-sowing and rice-planting day | |
| 夏作 | なつさく | crops planted in summer | |
| 夏祭 | なつまつり | summer festival; summer matsuri | |
| 夏空 | なつぞら | summer sky; summery weather; clear, blazing summer weather | |
| 毎夏 | まいなつ | every summer | |
| 夏祭り | なつまつり | summer festival; summer matsuri | |
| 日向夏 | ひゅうがなつ | hyuganatsu (species of citrus, Citrus tamurana) | |
| 三夏 | さんか | three summer months | n4 |
| 夏時間 | なつじかん | daylight saving time; daylight savings time; summer time | |
| 夏負け | なつまけ | suffering from summer heat | |
| 夏官 | かかん | Ministry of War (Zhou dynasty China) | n1 |
| 夏中 | げちゅう | period during which monks may go into a summer retreat | |
| 夏草 | なつくさ | summer grass | |
| 来夏 | らいか | next summer | |
| 夏至祭 | げしまつり | midsummer feast; summer solstice celebration; St John's day | |
| 夏じゅう | なつじゅう | whole summer; summer long | |
| 夏季休暇 | かききゅうか | summer vacation | |
| 九夏 | きゅうか | summer | n2 |
| 夏冬 | かとう | summer and winter | n2 |
| 夏時 | かじ | summertime | n2 |
| 暑夏 | しょか | hot summer | n2 |
| 西夏 | せいか | Western Xia (1038-1227); Western Hsia; Tangut Empire; Mi-nyak | n2 |
| 銷夏 | しょうか | summering; spending the summer | n2 |
| 一夏 | いちげ | one summer (during which a monk attends a summer retreat) | |
| 中夏 | ちゅうか | midsummer; China; capital (city) | |
| 冷夏 | れいか | cool summer; cold summer; cooler-than-normal summer | |
| 夏い | なつい | blisteringly hot; relentlessly hot; scorching | |
| 夏厨 | なつちゅう | summerfag; young and inexperienced user who joins an online community during the summer | |
| 夏向 | なつむき | for summer | |
| 夏柑 | なつかん | natsumikan (Citrus natsudaidai); Japanese summer orange | |
| 夏椿 | なつつばき | Japanese stewartia (Stewartia pseudocamellia) | |
| 夏橙 | なつだいだい | natsumikan (Citrus natsudaidai); Japanese summer orange | |
| 夏櫨 | なつはぜ | oldham blueberry (Vaccinium oldhamii) | |
| 夏毛 | なつげ | summer fur; summer coat; summer plumage | |
| 夏潮 | なつしお | summer tide; tide reflecting the summer sun | |
| 夏痩 | なつやせ | losing weight over the summer | |
| 夏眠 | かみん | estivation; aestivation; summer sleep | |
| 夏着 | なつぎ | summer clothes | |
| 夏羽 | なつばね | summer plumage; nuptial plumage | |
| 夏芽 | かが | summer bud | |
| 夏菊 | なつぎく | early chrysanthemums | |
| 夏萩 | なつはぎ | bush clover blossoming in the summer (esp. Lespedeza thunbergii) | |
| 夏藤 | なつふじ | Millettia japonica (species of flowering plant) | |
| 夏虫 | なつむし | summer insect; summer insects | |
| 夏蝉 | なつぜみ | summer cicadas | |
| 夏衣 | なつごろも | summer clothes | |
| 夏雲 | なつぐも | summer cloud; summer clouds | |
| 夏霞 | なつがすみ | summer haze; summer mist | |
| 夏霧 | なつぎり | summer fog; summer mist | |
| 夏風 | なつかぜ | summer breeze; summer cold | |
| 夏館 | なつやかた | villa arranged appropriately for summer; mansion arranged appropriately for summer | |
| 夏鳥 | なつどり | summer bird | |
| 小夏 | こなつ | hyuganatsu (species of citrus, Citrus tamurana) | |
| 春夏 | しゅんか | spring and summer | |
| 有夏 | ゆうか | Mainland China | |
| 炎夏 | えんか | hot summer; middle of summer | |
| 甘夏 | あまなつ | amanatsu (Citrus natsudaidai); Japanese summer orange; less sour variety of the natsumikan | |