This is a "Kotemmei, Mentori Katatsuki Kama" (tea kettle) of the 10th generation of the Onishi family, "Onishi Jousetsu." My mother, in her lifetime, enjoyed tea ceremony, and the tea kettle being offered was received 45 years ago, according to the date on a memo inside the extreme box. In addition to the memo, there is also a delivery receipt from when it was repaired. The delivery receipt details the repair work, including the re-tightening of the kettle bottom and damage repair, along with the total cost. Judging from the dates on the memo and the delivery receipt, the repairs took about six months and were expensive. This is perhaps because it is a tea utensil that has been carefully used for generations. Onishi Jousetsu (1777-1852) was a kama-shi (kettle maker) of the Kyoto Sanjo Kamaza (kettle seat) in the late Edo period. The "Kinoto-mi" (乙巳), written in the extreme certificate, is also the zodiac sign for 2025. Calculating backward from the 60-year cycle, it was 180 years ago, in 1845, when Jousetsu was 68 years old. The tea kettle is likely from an even earlier period. For reference, 1845 was during the Tenpo Reforms led by Roju Mizuno Tadakuni, when sumptuary laws were issued and frugality was strictly enforced. A label on the side of the extreme box reads "Kotemmei, Mentori Katatsuki Kama, Tomofuta" (matching lid). The kettle has rounded corners on the shoulders, gradually widening upwards, and the lid is made of the same material as the body. It seems that the simple and dignified shape of the Katatsuki Kama has been considered to combine practicality and artistry. The extreme certificate follows a nearly consistent format for each family line, and the one being offered follows the Onishi family's format, with the following content: ① Mentori Katatsuki Kama / ② One, body diameter six sun five bu / ③ One, mouth diameter three sun eight bu / ④ One, Kanzuke (ring attachment) Oni-men (demon face) / ⑤ Right kettle is a genuine Kotemmei, without question / ⑥ Kinoto-mi, Spring Day / ⑦ Okamashi (tea kettle maker) Onishi Jousetsu, Seal / Is "no-hei-i" (之平爲) in ⑤ a mistake? Is "爲" a variant of "作" (saku, meaning "made")? Is "Mabire no nai ronzuru you mo nai mono nari" (無紛論者也) likely to mean "There is no room for doubt"? The size (cm) and weight are approximately as follows, and the measured values do not differ from those in the extreme certificate. Mouth diameter 11.5, shoulder diameter 19.4 + Oni-men 3.6, Body diameter 19.7, bottom diameter 11.2 / Height 18.0 + lid knob 3.5 / Weight 3.2 kg / Tomobako (matching box) 22.6 square, 27 high / Weight 1.6 kg / The tea kettle being offered has a special flavor that has passed through time and generations, and the extreme box also has a strong antique feel. The tea kettle was repaired 45 years ago, and the rust was removed, and the material of the kettle bottom seems to be different? Was it originally a Katatsuki Tsubasa Kama (winged kettle)? Was it wingless at the time of the extreme certificate? We have no way of knowing the original form or condition. The repairs have been made, and there are almost no noticeable damages, dents, or deformations on the tea kettle or lid, and after filling it with water and leaving it overnight, there were no leaks. We hope that it will continue to be used for generations to come, and we would also appreciate it if the meaning of "no-hei-i" (之平爲), which is unclear in the extreme certificate, could be clarified.