Jewelry Manufacturers in Japan
| Nr | Company name | Location | Employees | Turnover |
| 1 | Seiko | Tokyo, Japan | 10,000+ | $2B |
| 2 | Hotate Powder | Nerima-ku, Tokyo, Japan | 51 – 200 | $146.8M |
| 3 | Gold Industries | 501 – 1,000 | $143.5M | |
| 4 | 日建塗装工業株式会社 | Arakawa, Japan | 201 – 500 | $137.8M |
| 5 | Nagahori | Tokyo, Japan | 201 – 500 | $131.3M |
| 6 | Maruzen | Minamisenba, Japan | 501 – 1,000 | $114.6M |
| 7 | 三京ダイヤモンド工業（株 | 海老名市, Japan | 51 – 200 | $85.5M |
| 8 | Silver Life | Nishishinjuku(Tsuginobiruwonozoku), Japan | 201 – 500 | $81.7M |
| 9 | CIMA | Tokyo, Japan | 201 – 500 | $70.8M |
| 10 | Tanaka Galvanizing | Mitejima, Japan | 51 – 200 | $70.7M |
| 11 | ForC | 201 – 500 | $51.8M | |
| 12 | Verite | Yokohama, Japan | 201 – 500 | $48M |
| 13 | Ueba Esou | Kyoto, Japan | 11 – 50 | $47.1M |
| 14 | Nihon Etching | Honhaneda, Japan | 201 – 500 | $40.7M |
| 15 | Iino Manufacturing | Shinagawa-ku, Tokyo, Japan | 11 – 50 | $29.2M |
| 16 | 山梨旭ダイヤモンド工業（株 | 韮崎市, Japan | 51 – 200 | $28.2M |
| 17 | 株）ダイヤモンド・グラフィック社 | 千代田区, Japan | 51 – 200 | $26.6M |
| 18 | Nihon Ruspert | Shinminatomachi, Japan | 51 – 200 | $26.4M |
| 19 | Nikka Seiko | Setagaya-ku, Tokyo, Japan | 201 – 500 | $25.5M |
| 20 | Ipia | Kofu, Japan | 51 – 200 | $25.1M |
| 21 | Crossfor | 51 – 200 | $23.5M | |
| 22 | IHI Ionbond | 51 – 200 | $22.5M | |
| 23 | Kosaikogei | Ochiai, Japan | 11 – 50 | $21.7M |
| 24 | TOKUOKA | Kamiyahagi, Japan | 201 – 500 | $21.1M |
| 25 | Crossfor | Kofu, Japan | 51 – 200 | $20.9M |
| 26 | Deluxe.co | 51 – 200 | $20.8M | |
| 27 | Gliese | Nihonbashi, Japan | 51 – 200 | $19.7M |
| 28 | The Association of Powder Process Industry and Engineering | Kitamachi, Japan | 11 – 50 | $15M |
| 29 | Metal Heat Treatment Solution | 11 – 50 | $13.1M | |
| 30 | Clap On | Tokyo, Japan | 51 – 200 | $12.4M |
| 31 | Linkties | 港区, Japan | 51 – 200 | $9.7M |
| 32 | Ultimate Works | 51 – 200 | $8.6M | |
| 33 | World Etching | Ichinomiya, Japan | 11 – 50 | $7.1M |
| 34 | ダイヤモンドヘッド（株 | Tokyo, Japan | 51 – 200 | $6.8M |
| 35 | Citizen Jewelry Co., Ltd. | Tokyo, Japan | 51 – 200 | $6.8M |
| 36 | Blanc Vert Privacy | Tokyo, Japan | 11 – 50 | $6.5M |
| 37 | Daikyo | Imaemachi, Japan | 11 – 50 | $6.1M |
| 38 | Suiken | 11 – 50 | $5.6M | |
| 39 | Spookies | Motoakuoujichou, Japan | 11 – 50 | $5.6M |
| 40 | TCK Workshop | Midorigaoka, Japan | 11 – 50 | $5.5M |
| 41 | Nihon Coating | Japan | 11 – 50 | $5.3M |
| 42 | Yoshikawa Kogyo | Chiba, Japan | 11 – 50 | $5.2M |
| 43 | 京都ダイヤモンド工業（株 | 京都市, Japan | 11 – 50 | $5.2M |
| 44 | Seiko Electric.co | 11 – 50 | $4.7M | |
| 45 | Creative Coatings | Nagaoka, Japan | 11 – 50 | $4.6M |
| 46 | Masaki Sango | 11 – 50 | $4.5M | |
| 47 | 株）アドフューテック | Japan | 1 – 10 | $4.4M |
| 48 | Vanmore | Japan | 11 – 50 | $4.1M |
| 49 | エアブラシに関することなら by エアテックス AIRTEX | 11 – 50 | $4M | |
| 50 | Toyohashi Ryoshoku Industry | Irifunechou, Japan | 11 – 50 | $4M |
| 51 | TacaoF | 11 – 50 | $3.9M | |
| 52 | ATELIER ings | 11 – 50 | $3.9M | |
| 53 | Re-House Coat | 11 – 50 | $3.7M | |
| 54 | UnitedTrading | Japan | 11 – 50 | $3.6M |
| 55 | MVX Hi-Teck | 1 – 10 | $3.5M | |
| 56 | MOTHERHOUSE | 11 – 50 | $3.3M | |
| 57 | Peroru | Fukuoka, Japan | 1 – 10 | $2.7M |
| 58 | KAZA | 11 – 50 | $2.4M | |
| 59 | Sirakaba | Senju, Japan | 1 – 10 | $2.4M |
| 60 | Naomi Tachibana | 1 – 10 | $2.2M | |
| 61 | MATSUURA | Asakusabashi, Japan | 11 – 50 | $2.2M |
| 62 | Sarah Zhuang Jewellery | 1 – 10 | $2.2M | |
| 63 | Ouija | 1 – 10 | $2.2M | |
| 64 | Wada Engraving Studio | 1 – 10 | $2M | |
| 65 | Hand Made | 1 – 10 | $2M | |
| 66 | Suzumi | Ootsukichou, Japan | 1 – 10 | $2M |
| 67 | Ya nagase sōko | Gifu-shi, Japan | 1 – 10 | $2M |
| 68 | Atelier Lianamana | 1 – 10 | $2M | |
| 69 | Beads Mania | Tokyo, Japan | 11 – 50 | $1.9M |
| 70 | Japan Jewellery Designers Association | 1 – 10 | $1.9M | |
| 71 | Antique-i | Ginza, Japan | 1 – 10 | $1.9M |
| 72 | SUGIMOTO BISOU | 1 – 10 | $1.9M | |
| 73 | Atelier Star Lights | 1 – 10 | $1.8M | |
| 74 | LINK AND CHAIN | Japan | 1 – 10 | $1.8M |
| 75 | The Handmade | 1 – 10 | $1.8M | |
| 76 | 株）大同キャスティングス | 名古屋市, Japan | 501 – 1,000 | $1.7M |
| 77 | oRo Miyazaki | Miyazaki, Japan | 11 – 50 | $1.6M |
| 78 | RINGBELL | Nihonbashi, Japan | 201 – 500 | $1.5M |
| 79 | Suradas | 1 – 10 | $1.5M | |
| 80 | Wedding Ring Styles | 1 – 10 | $1.5M | |
| 81 | Nagi | Japan | 1 – 10 | $1.2M |
| 82 | Ring Techs | Tsurajimachoutsurushinden, Japan | 1 – 10 | $1.2M |
| 83 | Ulvac Coating | Kamitakanoichikawachou, Japan | 1 – 10 | $1.1M |
| 84 | Dr MONROE.CO | Nagoya, Japan | 1 – 10 | $991,000 |
| 85 | JULICO | Futoochou, Japan | 1 – 10 | $947,000 |
| 86 | Galvaglow | 1 – 10 | $408,000 | |
| 87 | Patek Philippe | 1 – 10 | $385,000 | |
| 88 | Ogura Jewel Industry | 1 – 10 | $201,000 | |
| 89 | Marui Galvanizing | Shirahamachouusazakiminami, Japan | 1 – 10 | $197,000 |
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