Araki Tomei was born in Kyoto in Bunka 14 (1817). At thirteen he became a pupil of Goto Tojo, who allowed him the character To, and so he took the name Tomei. He later studied under Goto Ichijo, who granted him the workshop name Issai, and he signs Issai Tomei; he also used the art name Ginshotei. One record places him precisely in that circle as "a senior pupil of Ichijo, the grand master of the metalwork world of the bakumatsu". He also studied under-drawing with the Kyoto painter Hayashi Ranga, and the published sources say that his special subject, the ear of foxtail millet (awabo), was devised through study with Ranga, and that the millet already made him famous in his own day.
The millet ear is the whole of his reputation, and the published sources describe it with unusual precision. Each ear is built from seven conical grains forming a single cluster, the tips of the ears are sharp, and the ripe heads seem about to spill over on every side. On one mounting they note that the grains run in three rows with the middle row raised a step higher, struck up in three dimensions with a special chisel driven into the metal. Of the set raised to they write that this abundance is "truly the essence of Tomei". Later records call it his sole domain. One observes that many millet works were made in imitation of the technique, "yet no master, however skilled, could reach Tomei's art", and another states that among all metalworkers, as far as millet is concerned, "past or present, none equals Tomei".
His material is the orthodox one of his Goto training. Most of his fittings are with fine , worked in with and applied in gold and , the often with a gold-covered back, the in solid gold carved in the round. He ranges beyond it: a worked ishime on for the set, on a and , and on one mounting , a metal the record calls difficult to work and the more precious for it. For larger he turns to iron, carving the millet under the rising sun on the large guard and under the evening moon on the small, with gold and silver sunago inlay suggesting haze. The published sources repeatedly find his training in the details: the shigure file on the rim and the ceiling plate of the is called "a skill handed down from his teacher Ichijo", and the file on the ceilings and mouths of his is said to show the character of the Ichijo school clearly. Yet one record adds that, although transmitted as an Ichijo pupil, his work "differs somewhat in flavour from Ichijo", and it is the millet that makes the difference.
Around the millet he builds the harvest field. Sparrows and quail peck at the ears, and beside them stand bird clappers, a torn sedge hat, a winnowing basket and a hand basket, so that a set of fittings suggests a whole rural scene. In the leaves he shows autumn: on one pair of the withering, colour-changing leaves are set in gold and , and the stems and leaves move more than usual. A pair of , called a late Issai-signed work, spreads a quiet morning across four faces, the sun rising through mist while sparrows and quail feed. A few pieces leave the millet entirely. On a of given a surface "that could be mistaken for fine silk crepe", he carved Mount with the star god of longevity on clouds and a moonlit mountain stream, each paired with a Chinese poem; and on a pair of he alluded to Daikoku and Bishamonten through their attributes alone. The published sources note that these are not his usual millet work, and praise the quality of the and the precision of the carving.
His signatures document the man. Most pieces read Issai Tomei or Ginshotei Tomei, each with a ; on split the two names are divided. A few carry his real name, Araki Hidenobu, cut in the abbreviated form 東明荒秀信, which the published sources call rare and valuable as documentary evidence. The set bears both the Issai and the Hidenobu forms, and one pair of and comes with a sealed letter in his own hand signed Ginshotei Tomei. One mounting is dated on the , spring of Ansei 5 (1858). Many of his works are complete sets of matched fittings, often still on their original mountings, and one small sword mounting pairs his millet and with by Shibata Zeshin. Another mounting is described as "a refined mounting in the true Kyoto taste, splendour and restraint well balanced". The records name no pupils of his own.
Tomei's record is thirty designated works, all at the rank, one of them, the millet set, raised to . He has no National Treasures and no Important Cultural Properties. That set is published in no Hana, kept in a box of the Ryushido collection, with a box inscription of Meiji 37 by Ikeda Takao, and three further pieces also come in boxes from the Ryushido collection. No current holder is recorded against his designated work. A private collector may meet a signed Tomei millet set from time to time rather than often, and one more record sums up what such a set should show: a work that realizes, "in the literal sense, 'Here is Tomei'".