When are foreign language based words written with kanjis?


I was reading the wikia of an anime and I found this,

Red Riot Unbreakable 烈怒頼雄斗安無嶺過武瑠 (レッドライオットアンブレイカブル) (Reddo Raiotto
Anbureikaburu)

The name of a technique "Reddo Raiotto Anbureikaburu" based in the english
words "Red Riot Unbreakable" are written with the kanjis 烈怒頼雄斗安無嶺過武瑠. I
thought foreign words were always written with katakana but this isnt the
case. When are foreign language words written into japanese using kanjis?




This is something that can be called a 暴走族風当て字, which is explained in this
question: [Origin of 夜露死苦?](https://japanese.stackexchange.com/q/15138/5010)

You can see more examples here:

  * [【夜露死苦】ヤンキー漢字クイズ10連発！ 全部読めたらエリートヤンキーに認定ッ!!](https://rocketnews24.com/2017/08/02/935899/)
  * [「魔苦怒奈流怒」読めます？昭和ヤンキーは漢字で書く！](https://woman.mynavi.jp/article/141118-26/)
  * [暴走族文字変換](http://vxvxv.net/tool/conv_zok.php) (online converter, _Stack Exchange_ is 棲汰苦獲苦棲血炎慈)

They often wore coats full of difficult kanji [like
this](https://search.yahoo.co.jp/image/search?p=%E7%89%B9%E6%94%BB%E6%9C%8D+%E6%9A%B4%E8%B5%B0%E6%97%8F&aq=-1&oq=&ei=UTF-8).
This type of creative ateji is basically unique to the 暴走族/ヤンキー culture in the
Showa era. Today, almost no young people do this seriously any more, but you
may still see this type of ateji in fiction. The [user of
安無嶺過武瑠](http://dic.nicovideo.jp/a/%E5%88%87%E5%B3%B6%E9%8B%AD%E5%85%90%E9%83%8E)
is not directly related to 暴走族, but this ateji seems to symbolize his rough
but mannish and upright character.




This is something that can be called a 暴走族風当て字, which is explained in this
question: [Origin of 夜露死苦?](https://japanese.stackexchange.com/q/15138/5010)

You can see more examples here:

  * [【夜露死苦】ヤンキー漢字クイズ10連発！ 全部読めたらエリートヤンキーに認定ッ!!](https://rocketnews24.com/2017/08/02/935899/)
  * [「魔苦怒奈流怒」読めます？昭和ヤンキーは漢字で書く！](https://woman.mynavi.jp/article/141118-26/)
  * [暴走族文字変換](http://vxvxv.net/tool/conv_zok.php) (online converter, _Stack Exchange_ is 棲汰苦獲苦棲血炎慈)

They often wore coats full of difficult kanji [like
this](https://search.yahoo.co.jp/image/search?p=%E7%89%B9%E6%94%BB%E6%9C%8D+%E6%9A%B4%E8%B5%B0%E6%97%8F&aq=-1&oq=&ei=UTF-8).
This type of creative ateji is basically unique to the 暴走族/ヤンキー culture in the
Showa era. Today, almost no young people do this seriously any more, but you
may still see this type of ateji in fiction. The [user of
安無嶺過武瑠](http://dic.nicovideo.jp/a/%E5%88%87%E5%B3%B6%E9%8B%AD%E5%85%90%E9%83%8E)
is not directly related to 暴走族, but this ateji seems to symbolize his rough
but mannish and upright character.

