Under Ninja
Under Ninja is a manga series.
In detail
It is recorded as the work of Kengo Hanazawa. The recorded language is Japanese.
It is associated with Japan.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Under Ninja”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q60985374: Under Ninja
Consult the source