Jpop Boys

Mamehara Issei (JO1 Member) Age, Bio, Wiki, Facts & More


Mamehara Issei (豆原 一成) is a member of a Japanese boy group named JO1. The group consists of 11 male members:  Yonashiro Sho, Kawashiri Ren, Shiroiwa Ruki, Kono Junki, Sato Keigo, Kawanishi Takumi, Kimata Syoya, Ohira Shosei, Kinjo Sukai, Tsurubo Shionand Mamehara Issei. They debuted on March 4th, 2020 with their single ‘PROTOSTAR’. The group is under LAPONE ENTERTAINMENT.

His stage name is Mamehara Issei (豆原 一成). His birth name is Mamehara Issei (豆原 一成). He was born on May 30th, 2002. His age is 19 years old as of 2021. He is Japanese by Nationality. His Zodiac sign is Gemini. His Chinese zodiac is N/A.

He is the Main Dancer, Lead Rapper, Vocalist, Center, Youngest of the group.

Check out and follow Mamehara Issei’s Social Media accounts :

Instagram: N/A

YouTube: N/A

Twitter: N/A

TikTok: 2148944305

Early Life :

He was born in Okayama, Japan.

Physical Appearance:

He is young, smart, and handsome. He is popular among youths. His looks make him look younger than his actual age. He has black eyes and brown hair. 

His height is 5’8” (173cm) and his weight is 69kg (152lbs). His blood group is O.

Family, Religion & Girlfriends:

He has a sister, 3 years older than him.

Not much known about her family and her personal Relationship.


  • He speaks Japanese English.
  • He placed 1st on Produce 101 Japan.
  • His official color is Red.
  • His hobbies are dancing, singing, looking at clothes on Mercari and making tiktoks.
  • He is a fashionista.
  • He loves to travel.
  • He loves to hang out on beaches.
  • His special skills are 90’s Hip-Hop, baseball, swimming, and doing Kamen Rider impressions.

Mamehara Issei’s Favorites :

  • His favorite color is red.
  • His favorite food is his mother’s pork soup.

Check out JO1’s Social Media Accounts below:


Check out JO1|’Shine A Light’ MV :