Drop it.

https://hokuto.fandom.com/wiki/Keiraku_Hako
https://ja.wikipedia.org/wiki/経絡秘孔

Most web search results say this word refers to "destructive points" from the manga 北斗の拳. These are basically like "hidden points" (see entry 2854410・秘孔) but it's a technique used by the bad guys in the manga instead of the good guys.

Without some evidence that this is used to mean "shard," I'd say we could delete this entry or move it to JMnedict with a [fict] tag. Unlike the word 秘孔, which is still referenced in media decades after 北斗の拳 finished publication, I don't expect that 破孔 is notable enough for JMdict.