Iwamoto Konkan was born in Edo in the first year or Enkyo (1744) with the surname Asai. The Iwamoto line was founded by Chubei who studied under the Yokoya school. Konkan was the younger apprentice studying under the fourth master Ryokan, but following the early death of the fifth master, he subsequently ascended to the sixth head of the school. Despite the Iwamoto roots in the Yokoya School, Konkan embraced the carving techniques of Yasuchika from the Nara School, creating a unique aesthetic marrying the best of both traditions. This piece is a stunning combination of a tachi koshirae and military fan on the front menuki, and a bow with arrows on the reverse menuki. The motif likely relates to Hachimantaro, and shows skillful attention to detail combining techniques in gold, iroe, and inlay to create a remarkably realistic depiction.