The signature on this piece is well but rather formally carved for Zeshin and the form of the cases and the overall shape of the inro is also very formal. It is close to those of the Koma Kansai line and other traditional inro makers. Examples of inro by Kansai in a similar form are illustrated in Raymond Bushell's The Inro Handbook, pp. 101 and 102, nos. 68 and 69. Shibata Zeshin was a pupil of Koma Kansai II, and this is probably an example of his early work, while still under the influence of his master.