noun
amanatsu; Japanese summer orange
A citrus fruit, a less sour variety of the natsumikan (夏みかん). Often eaten fresh or used in sweets.
See also: 夏みかん
甘夏は普通の夏みかんより酸味が少なくて食べやすい。
Amanatsu is less sour than regular natsumikan and easier to eat.
このマーマレードは甘夏で作ったものです。
This marmalade is made from amanatsu.
Natsumikan is the original, more sour citrus; amanatsu is a sweeter, less sour variety.
From 甘 (ama, 'sweet') + 夏 (natsu, 'summer'), referring to a sweet summer citrus. The exact derivation is uncertain, but it is a named variety of the natsumikan.