Akira is a popular Japanese name for both sexes that's migrated to the West because of its appearance in manga and video games.  Akiro is a related name popular for boys.

Akira

One Japanese name that feels Western, though not quite American. 

Botan

Benjiro

This name with a beautiful meaning can be used for girls as well as boys.

Hikaru

Hiro is an apt name for a hero of the show <em>Heroes</em> -- and for our times.  Widely used in Japan, sometimes also for girls. Hiroshi is a long form.

Hiro

Hachiro

Haru

Hayato

Ichiro is a good classic choice for the first boy in a Japanese family. 

Ichiro

Commonly used Japanese name -- and not only for a second son. 

Jiro

Kazuki is related to names like Kazuko, Kazuo and Kazumi

Kazuki

One of several Japanese names that refer to a child's place in the family birth order. Kenji has attracted notice in the US as the name of The Food Lab chef, James Kenji López-Alt, know simply as Kenji.

Kenji

Kiyoshi

Kaoru

Kentaro

Makoto

Mizuki

This attractive mini-name combines multiple trends: the R initial, vowel-ending boy names, and a fantastical meaning.

Shinji

Shiro

Shohei

Suzuki

Well used in Japan, appreciated for its powerful meaning. 

Takeo

Takashi

Toshiro

Toshiyuki

An appealing Japanese name with a nickname feel.

Yuki

Yoshiro

A spiritual word name used by actor Zoe Saldana for her son as well as more recently Nick Cannon and Alyssa Scott for their late son. Zen has been trending in recent years along with other spiritual names such as Bodhi and Zion, and recently entered the US Top 1000 for the first time in 2022.

AnoushkaCC's list "Best Japanese Names (Guys)" of 29 great name ideas: Akira - Zen!