Board Thread:Episode Discussions/@comment-1181222-20170712100345/@comment-945885-20170712175500

Well, the Japanese audience seem to have completely taken it to be the name of Boruto's dojutsu.

Speculation on 2chan is that it may be derived from folklore concerning Bhaisajyaguru, the so-called Medicine Buddha, also known as Yakushi (the origin of Kabuto's surname).

Specifically, this sutra: http://www.rk-world.org/publications/lotussutra_B27.html

There do appear to be some parallels, perhaps too many to be pure coincidence.