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USPTO Patent Rankings Data through Dec 31, 2025
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Tsukuba, JP All Time

16,105 patents  ·  2,818 inventors

Ranked #181 of 112,640 cities Top 1%

Tsukuba, JP ranks #181 worldwide for total patents filed all time, with 16,105 patents from 2,818 inventors. Leading employers of inventors based in Tsukuba, JP include Intel, Sumitomo Electric Industries, Canon.

Showing 1–50 of 2,818 inventors

Rank Inventor Primary Company Patents
1 Yoshihiro Tomita Intel 134
2 Takeyoshi Masuda Sumitomo Electric Industries 115
3 Sadayuki Sugama Canon 113
#4 Hitoshi Kubota Nissan Motor Co. 100
#5 Takashi Iijima Fujitsu Limited 98
#6 Hiroshi Nagata Ulvac 92
#7 Toshiaki Ueda Mitsubishi Materials 85
#8 Yasunori Uetani Sumitomo Chemical 82
#9 Toshiaki Hasegawa Yazaki 79
#10 Shigeru Sasaki Hitachi 78
#11 Bunya Hayashi Smc 74
#12 Shinsuke Harada Fuji Electric Co. 72
#13 Akihiro Kikuchi Sony 68
#14 Shoji Yamaguchi — 66
#15 Jun Akedo National Institute Of Advanced Industrial Science And Technology 64
#16 Junji Tominaga Tdk 61
#16 Hirofumi Tanaka Mitsui Chemicals 61
#18 Akio Fukushima Hitachi 60
#19 Kazutaka Yanagita Canon 59
#19 Yasuo Iijima Kabushiki Kaisha Toshiba 59
#19 Yasushi Sakai Fuji Electric Co. 59
#19 Tomohiro Ono Kuraray Co. 59
#23 Takayuki Iijima Seiko Epson 57
#24 Hiroshi Nagase Toray Industries 55
#25 Manabu Jimba Canon 54
#26 Takashi Aizawa Canon 53
#26 Seiji Ohno — 53
#28 Shiro Shibayama Ono Pharmaceutical Co. 52
#29 Hiromu Shiomi Sumitomo Electric Industries 51
#29 Akio Imai Sumitomo Chemical 51
#29 Osamu Takeuchi Fujitsu Limited 51
#29 Hiroshi Ishihara Aisin Seiki Kabushiki Kaisha 51
#33 Shu Namiki Furukawa Electric Co. 50
#34 Yoshitaka Takezawa Hitachi 46
#34 Akio Kanatani Banyu Pharmaceutical Co. 46
#34 Masaharu Kinoshita Hitachi 46
#34 Takahiro Nagata Yokowo Co. 46
#38 Noriyuki Iwamuro Fuji Electric Co. 45
#38 Masashi Seki Epizyme 45
#40 Shuichi Ohkubo Nec 44
#40 Hirofumi Nakagawa Japan Display 44
#40 Yoshiyuki Sankai University Of Tsukuba 44
#43 Isao Hayase Hitachi 43
#43 Hiroyuki Yoshimura Eisai 43
#43 Seiji Hijikata Hitachi Construction Machinery Co. 43
#46 Toshihide Nabatame Hitachi 41
#46 Ken Okamoto Mitsubishi Electric 41
#46 Kazuto Takao Kabushiki Kaisha Toshiba 41
#49 Hiroto Nishihara Canon 40
#49 Shinji Yuasa National Institute Of Advanced Industrial Science And Technology 40

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