--- title: Seven Year Old Blackbelt Named Mahiro Shows Off Karate Skills description: We do not recommend messing with her canonical: https://time.com/2819316/this-7-year-old-black-belt-could-seriously-mess-you-up/ author: Samantha Grossman article:opinion: false article:content_tier: free article:published_time: 2014-06-03T19:13:25.000Z article:modified_time: 2026-04-13T07:10:19.994Z og:title: This 7-Year-Old Black Belt Could Seriously Mess You Up og:description: We do not recommend messing with her og:url: https://time.com/2819316/this-7-year-old-black-belt-could-seriously-mess-you-up/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production og:image:width: 1200 og:image:height: 675 og:image:alt: TIME og:type: article twitter:card: summary_large_image twitter:title: This 7-Year-Old Black Belt Could Seriously Mess You Up twitter:description: We do not recommend messing with her twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production --- # This 7-Year-Old Black Belt Could Seriously Mess You Up by [Samantha Grossman](https://time.com/author/samantha-grossman/) ## Samantha Grossman Jun 3, 2014 7:13 PM UTC by [Samantha Grossman](https://time.com/author/samantha-grossman/) ## Samantha Grossman Jun 3, 2014 7:13 PM UTC This is Mahiro, and at age 7, she has already earned her black belt in Kanku Dai karate. At first glance, you might think she looks “cute” or “sweet” or “adorable.” But realistically, she could beat up your entire family. ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/2819316/this-7-year-old-black-belt-could-seriously-mess-you-up/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/2819316/this-7-year-old-black-belt-could-seriously-mess-you-up/"},"headline":"This 7-Year-Old Black Belt Could Seriously Mess You Up","datePublished":"2014-06-03T19:13:25.000Z","dateModified":"2026-04-13T07:10:19.994Z","description":"We do not recommend messing with her","url":"https://time.com/2819316/this-7-year-old-black-belt-could-seriously-mess-you-up/","keywords":["Newsfeed","viral"],"thumbnailUrl":"","author":[{"@type":"Person","name":"Samantha Grossman","jobTitle":null,"url":"https://time.com/author/samantha-grossman/"}],"articleSection":"","image":[],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/tag/time-section-newsfeed/","name":"Newsfeed"}},{"@type":"ListItem","position":2,"item":{"@id":"https://time.com/2819316/this-7-year-old-black-belt-could-seriously-mess-you-up/","name":"This 7-Year-Old Black Belt Could Seriously Mess You Up"}}]}] ```