- Shien translated means "Blue flame". Shōgun is a military rank and historical title in Japan.
- The Shien card series was most likely inspired by the great Japanese warlord Oda Nobunaga. He shares almost all of the traits that are popularly associated with Nobunaga and looks exactly like the "Samurai Warriors" depiction of Nobunaga.
- This monster appears in the artworks of "Gozen Match", "Blind Spot Strike", "Stand-Off", "Face-Off", "Evenly Matched" and "Barrier Ninjitsu Art of Hazy Transfer".
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