2,686 blocks registered in Japan.

🇯🇵 Ubiquitous Computing Technology Corporation 9C:B0:08:00:00:00 /24 MA-L 🇯🇵 UDTech Japan Corporation 00:0C:4F:00:00:00 /24 MA-L 🇯🇵 Ueda Japan Radio Co., Ltd. 00:0F:DC:00:00:00 /24 MA-L 🇯🇵 ULTRA-X ASIA PACIFIC Inc. 00:1B:D2:00:00:00 /24 MA-L 🇯🇵 Ultrasonic Engineering Co., Ltd. 8C:1F:64:2B:90:00 /36 MA-S 🇯🇵 ULVAC,Inc. 38:01:18:00:00:00 /24 MA-L 🇯🇵 Umezawa Musen Denki Co., Ltd. 00:04:14:00:00:00 /24 MA-L 🇯🇵 Unicom Automation Co., Ltd. 00:07:0A:00:00:00 /24 MA-L 🇯🇵 UNIDEN CORPORATION 00:E0:11:00:00:00 /24 MA-L 🇯🇵 Union Electronic. 8C:1F:64:BD:70:00 /36 MA-S 🇯🇵 Unirobot Corporation 14:4F:D7:A0:00:00 /28 MA-M 🇯🇵 UNITEC CO., LTD. 00:E0:5D:00:00:00 /24 MA-L 🇯🇵 UNITEC Co., Ltd. 98:DC:D9:00:00:00 /24 MA-L 🇯🇵 University of FUKUI D4:9C:8E:00:00:00 /24 MA-L 🇯🇵 Uniwell Corporation 00:0F:C2:00:00:00 /24 MA-L 🇯🇵 UQUEST, LTD. 00:15:CC:00:00:00 /24 MA-L 🇯🇵 UrbanChain Group Co., Ltd 8C:1F:64:50:60:00 /36 MA-S 🇯🇵 URYU SEISAKU, LTD. 00:12:F9:00:00:00 /24 MA-L 🇯🇵 USC CORPORATION 00:20:EF:00:00:00 /24 MA-L 🇯🇵 USC DigiArk Corporation 00:1C:B7:00:00:00 /24 MA-L 🇯🇵 Uzushio Electric Co.,Ltd. 54:9A:16:00:00:00 /24 MA-L 🇯🇵 V Technology Co., Ltd. 64:9B:24:00:00:00 /24 MA-L 🇯🇵 VAIO Corporation CC:30:80:00:00:00 /24 MA-L 🇯🇵 VALCOM CO.,LTD. 40:B0:A1:00:00:00 /24 MA-L 🇯🇵 Vectology,Inc 70:B3:D5:F5:00:00 /36 MA-S 🇯🇵 VECTOR.CO.,LTD. 70:B3:D5:D3:30:00 /36 MA-S 🇯🇵 Venetex Corp 6C:AC:60:00:00:00 /24 MA-L 🇯🇵 Vertex Co.,Ltd. 70:B3:D5:8D:D0:00 /36 MA-S 🇯🇵 Vertex Link Corporation 00:18:3D:00:00:00 /24 MA-L 🇯🇵 Vertex Standard LMR, Inc. 58:94:CF:00:00:00 /24 MA-L 🇯🇵 VICTOR COMPANY OF JAPAN, LTD. 00:80:88:00:00:00 /24 MA-L 🇯🇵 Video Tech Laboratories, Inc. 00:50:C2:D2:B0:00 /36 IAB 🇯🇵 VIDEOTRON CORP. 00:0E:88:00:00:00 /24 MA-L 🇯🇵 VIE STYLE,INC, C4:83:72:A0:00:00 /28 MA-M 🇯🇵 Vision Sensing Co., Ltd. 70:B3:D5:93:F0:00 /36 MA-S 🇯🇵 Vitec System Engineering Inc. 88:01:F2:00:00:00 /24 MA-L 🇯🇵 Vitec System Engineering Inc. 70:B3:D5:79:90:00 /36 MA-S 🇯🇵 Vixen Co., Ltd. 00:0C:34:00:00:00 /24 MA-L 🇯🇵 Waco Giken Co., Ltd. 70:B3:D5:81:50:00 /36 MA-S 🇯🇵 WACOM Co.,Ltd 00:13:C2:00:00:00 /24 MA-L 🇯🇵 Wacom Co.,Ltd. 28:8E:B9:00:00:00 /24 MA-L 🇯🇵 Wacom Co.,Ltd. 44:68:0C:00:00:00 /24 MA-L 🇯🇵 Wacom Co.,Ltd. 4C:96:8A:00:00:00 /24 MA-L 🇯🇵 Wacom Co.,Ltd. 68:A8:E1:00:00:00 /24 MA-L 🇯🇵 Wacom Co.,Ltd. 88:4A:70:00:00:00 /24 MA-L 🇯🇵 Wacom Co.,Ltd. BC:06:2D:00:00:00 /24 MA-L 🇯🇵 Wacom Co.,Ltd. E8:A8:48:00:00:00 /24 MA-L 🇯🇵 Watanabe Electric Industry Co., Ltd. 00:02:B7:00:00:00 /24 MA-L 🇯🇵 Watec Co., Ltd. C4:7C:8D:30:00:00 /28 MA-M 🇯🇵 Wattty Corporation 6C:23:CB:00:00:00 /24 MA-L 🇯🇵 WAVE Corporation 00:0F:C1:00:00:00 /24 MA-L 🇯🇵 WDJ Hi-Tech Inc. 74:25:84:E0:00:00 /28 MA-M 🇯🇵 WEBTRONICS 00:60:BE:00:00:00 /24 MA-L 🇯🇵 Welcat Inc 00:19:12:00:00:00 /24 MA-L 🇯🇵 WESTUNITIS CO., LTD. 68:78:48:00:00:00 /24 MA-L 🇯🇵 WICKS Co., Ltd. 3C:6A:2C:90:00:00 /28 MA-M 🇯🇵 Wild Lab. Ltd. 00:30:F5:00:00:00 /24 MA-L 🇯🇵 Will corp. 00:50:C2:E7:40:00 /36 IAB 🇯🇵 WILLNET, INC. 00:10:C2:00:00:00 /24 MA-L 🇯🇵 Winglet Systems Inc. FC:D2:B6:90:00:00 /28 MA-M 🇯🇵 Wireless Technologies, Inc 00:09:42:00:00:00 /24 MA-L 🇯🇵 Wireless Tsukamoto.,co.LTD 84:6A:ED:00:00:00 /24 MA-L 🇯🇵 WiViCom Co., Ltd. 70:B3:D5:B2:90:00 /36 MA-S 🇯🇵 WIZAPPLY CO.,LTD 70:B3:D5:8D:20:00 /36 MA-S 🇯🇵 WORKBIT CORPORATION. 00:30:9E:00:00:00 /24 MA-L 🇯🇵 Xacti Corporation 70:B3:D5:1D:20:00 /36 MA-S 🇯🇵 Xacti Corporation 70:B3:D5:82:80:00 /36 MA-S 🇯🇵 Xacti Corporation 8C:1F:64:60:50:00 /36 MA-S 🇯🇵 Xacti Corporation 8C:1F:64:90:E0:00 /36 MA-S 🇯🇵 XRONOS-INC 78:C2:C0:10:00:00 /28 MA-M 🇯🇵 XRONOS.INC 40:D8:55:00:00:00 /36 IAB 🇯🇵 Xsido Corporation 00:0A:32:00:00:00 /24 MA-L 🇯🇵 XTIA Ltd. 8C:1F:64:A5:E0:00 /36 MA-S 🇯🇵 XTrillion, Inc. BC:71:C1:00:00:00 /24 MA-L 🇯🇵 XYTAC system technologies 00:50:C2:46:40:00 /36 IAB 🇯🇵 Y-products co.ltd. 00:50:C2:A5:10:00 /36 IAB 🇯🇵 Y.D.K Co. Ltd. 00:07:A5:00:00:00 /24 MA-L 🇯🇵 YAESU MUSEN CO., LTD. 00:01:25:00:00:00 /24 MA-L 🇯🇵 Yahoo! JAPAN 64:5E:BE:00:00:00 /24 MA-L 🇯🇵 YAMABISHI Corporation F4:1F:0B:00:00:00 /24 MA-L 🇯🇵 YAMAHA CORPORATION 00:A0:DE:00:00:00 /24 MA-L 🇯🇵 YAMAHA CORPORATION AC:44:F2:00:00:00 /24 MA-L 🇯🇵 YAMAHA CORPORATION F4:D5:80:00:00:00 /24 MA-L 🇯🇵 YAMAHA MOTOR CO.,LTD 00:04:C6:00:00:00 /24 MA-L 🇯🇵 YAMAKATSU ELECTRONICS INDUSTRY CO., LTD. 70:B3:D5:05:30:00 /36 MA-S 🇯🇵 Yamaki Electric Corporation 00:09:F1:00:00:00 /24 MA-L 🇯🇵 Yamamoto Works Ltd. 70:B3:D5:DF:B0:00 /36 MA-S 🇯🇵 YAMASHITA SYSTEMS CORP. 00:50:01:00:00:00 /24 MA-L 🇯🇵 YAMATAKE-HONEYWELL CO., LTD. 00:20:04:00:00:00 /24 MA-L 🇯🇵 Yamato Denki Co.,Ltd. A4:DA:D4:00:00:00 /24 MA-L 🇯🇵 Yamato Scale Co.,Ltd. C8:F3:6B:00:00:00 /24 MA-L 🇯🇵 YANO ELECTRIC CO., LTD. 00:D0:32:00:00:00 /24 MA-L 🇯🇵 YASKAWA ELECTRIC CORPORATION 00:20:B5:00:00:00 /24 MA-L 🇯🇵 Yasuda Joho Co.,ltd. F8:42:FB:00:00:00 /24 MA-L 🇯🇵 YAWATA ELECTRIC INDUSTRIAL CO.,LTD. E8:B4:70:40:00:00 /28 MA-M 🇯🇵 YAWATA ELECTRIC INDUSTRIAL CO.,LTD. 40:D8:55:17:20:00 /36 IAB 🇯🇵 YAWATA ELECTRIC INDUSTRIAL CO.,LTD. 70:B3:D5:BC:E0:00 /36 MA-S 🇯🇵 YAZAKI CORPORATION 00:0F:DA:00:00:00 /24 MA-L 🇯🇵 YAZAKI Energy System Corporation F8:9F:B8:00:00:00 /24 MA-L 🇯🇵 YDK Technologies Co.,Ltd 70:B3:D5:7F:00:00 /36 MA-S