This is a list of names in which the usage is Japanese; and the first letter is J.
Jin 2 仁, じん m JapaneseFrom Japanese
仁 (jin) meaning "compassionate" or other kanji having the same reading.
Jirō 二郎, じろう m JapaneseFrom Japanese
二 (ji) meaning "two" and
郎 (rō) meaning "son". This was traditionally a name given to the second son. Other combinations of kanji characters can also be possible.
Jun 2 淳, 潤, 純, 順, じゅん m & f JapaneseFrom Japanese
淳 (jun) meaning "pure",
潤 (jun) meaning "moisture",
純 (jun) meaning "pure, clean, simple", or other kanji that are pronounced the same way.
Jun'ichi 順一, 淳一, じゅんいち m JapaneseFrom Japanese
順 (jun) meaning "obey, submit" or
淳 (jun) meaning "pure" combined with
一 (ichi) meaning "one". Other kanji combinations are possible.
Junko 順子, 純子, じゅんこ f JapaneseFrom Japanese
順 (jun) meaning "obedience" or
純 (jun) meaning "pure" combined with
子 (ko) meaning "child". Other combinations of kanji characters are also possible.
Junpei 純平, 淳平, 順平, じゅんぺい m JapaneseFrom Japanese
純 (jun) or
淳 (jun) both meaning "pure" combined with
平 (pei) meaning "level, even, peaceful". Other kanji combinations can also form this name.
Jūrō 十郎, じゅうろう m JapaneseFrom Japanese
十 (jū) meaning "ten" and
郎 (rō) meaning "son". Traditionally this name was given to the tenth son. Other combinations of kanji characters are possible as well.