The naginata that Musashibou Benkei was said to have wielded. Has an overwhelming huge size and a broad-minded personality. Nevertheless, he is of good upbringing and has a dignified taste in appearances. Because he likes small and smart/nimble things, he dotes on Imanotsurugi.
Comments from Voice Actor
Q: Tell us your impression of the character you are acting as and what enthuses you most when you are acting him.
A: To put it simply, my image of Iwatooshi is apart from being Benkei's naginata, he's open-minded and takes good care of others. I hope to put up a performance that will betray all saniwa's expectations in a good way!
Q: Tell us about any happenings around you lately that feels like "Hanamaru".
A: "To be thanked by saying that it was great that I was the one who acted out the character I acted made me really happy. I finally achieved the happiness of being an actor.