Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Kashiwazaki, JP ranks #4,490 worldwide for total patents filed all time, with 613 patents from 111 inventors. Leading employers of inventors based in Kashiwazaki, JP include Kabushiki Kaisha Toshiba, Nec, Pioneer Electronic.

Showing 1–50 of 111 inventors

Rank Inventor Primary Company Patents
1 Hidesato Saruwatari Kabushiki Kaisha Toshiba 59
2 Tsutomu Matsui Nec 57
3 Nobuyasu Negishi Pioneer Electronic 40
#4 Masaaki Fujita Sanden 31
#5 Hiroyuki Sugihara Toyota 28
#6 Tadahiko Watanabe Agency Of Industrial Science And Technology 27
#7 Hiromichi Kuriyama Kabushiki Kaisha Toshiba 25
#8 Hideaki Morishima Kabushiki Kaisha Toshiba 24
#9 Tatsuya Shinoda Kabushiki Kaisha Toshiba 22
#10 Masahiko Wada Fujitsu Limited 18
#11 Haruchika Ishii Kabushiki Kaisha Toshiba 14
#12 Eiki Kashiwazaki Kabushiki Kaisha Toshiba 12
#13 Osamu Yaguchi Riken 11
#14 Yuji Shima Riken 10
#14 Yasuaki Murashi Kabushiki Kaisha Toshiba 10
#14 Masaki Moronuki Riken 10
#17 Takuma Sekiya Riken 9
#17 Koichi Takeshita Kabushiki Kaisha Toshiba 9
#19 Sumio Ono Riken 8
#19 Katsuhiro Tsuji Riken 8
#21 Yuma Kikuchi Kabushiki Kaisha Toshiba 7
#21 Masao Shimbo Bourbon 7
#21 Toshiya Kusayanagi Nec 7
#24 Daisaku Kobayashi Aisin Seiki Kabushiki Kaisha 6
#25 Yuuichi Murayama Riken 5
#26 Takeshi Nakaoka 4
#26 Hatsutaro Mizuno Riken 4
#26 Asuna Hagiwara Kabushiki Kaisha Toshiba 4
#26 Kazutoshi Takemura Riken 4
#26 Haruhito Watanabe Akebono Brake Industry Co. 4
#26 Masahiro Nakazawa Riken 4
#26 Naoki Iwamura Kabushiki Kaisha Toshiba 4
#26 Tunesaku Itaba Aisin Seiki Kabushiki Kaisha 4
#26 Masaki Ooya Riken 4
#35 Koji Oki Sumitomo Metal Industries 3
#35 Youhei IWAMOTO Riken 3
#35 Seisuke Inada Yaizu Suisankagaku Industry Co. 3
#35 Genki Yamagishi Kabushiki Kaisha Toshiba 3
#35 Hiroshi Kon 3
#35 Hiroshi Miida Riken 3
#35 Sumitoshi Mai Riken 3
#35 Toru Onuki Komatsu Shisakusho 3
#35 Koichiro Kasahara Aisin Seiki Kabushiki Kaisha 3
#35 Hiroyuki Yabune Riken 3
#35 Tomoya Shibano Riken 3
#35 Fumio Kiyota Riken 3
#47 Nobuo Katayama Riken 2
#47 Kazunori Kusama Riken 2
#47 Ayako Kakegawa 2
#47 Hironori Takatsuka Kabushiki Kaisha Toshiba 2