About Rubycon

Rubycon Corporation (ルビコン株式会社) — Company Description

Overview / 会社概要
Rubycon Corporation (ルビコン株式会社) is a leading Japanese manufacturer of electronic components, specializing in capacitors (コンデンサ) and switching power supplies (スイッチング電源).
The company was founded on April 28, 1952, and is headquartered in Ina City, Nagano Prefecture (長野県伊那市).

Main Business / 主な事業内容
Rubycon develops, designs, and manufactures:

Aluminum Electrolytic Capacitors (アルミ電解コンデンサ)

Conductive Polymer Capacitors (導電性ポリマーコンデンサ)

Film Capacitors (フィルムコンデンサ)

Switching Power Supply Units (スイッチング電源ユニット)


The company is known for high-reliability components used in industrial equipment, consumer electronics, communication systems, and energy-efficient power solutions.

Corporate History / 沿革
Rubycon began as a small capacitor manufacturer and adopted the brand name “Rubycon” in 1953.
In 1990, the company officially became Rubycon Corporation.
Over the decades, the company expanded its R&D and manufacturing capabilities both inside Japan and overseas.

Global Operations / グローバル展開
Rubycon operates multiple manufacturing plants in Japan—including facilities in Nagano, Akita, Fukushima, and Niigata (長野・秋田・福島・新潟)—and also maintains overseas production sites such as PT Rubycon Indonesia.
Rubycon Group currently employs thousands of workers across Japan and international branches.

Corporate Philosophy / 企業理念
Rubycon focuses on:

High quality (高品質)

Technological innovation (技術革新)

Environmental responsibility (環境への配慮)

Stable and reliable product performance (安定した信頼性)


The company aims to provide “the world’s top-class capacitors” (世界トップクラスのコンデンサ).

Financial & Organizational Profile / 組織と財務
Rubycon has a registered capital of approximately 396 million yen (資本金396百万円) and maintains consolidated sales in the tens of billions of yen annually.
The group consists of more than 2,600 employees worldwide (グローバルで2,600名以上).

Technology & Achievements / 技術と実績
Rubycon is widely recognized for advanced technologie