Siki Co., Ltd. Company Description

Siki Co., Ltd. develops and sells software applications.

The company also focused on advanced internet security and digital product creation, including encrypted digital cash and security.

In addition, it offers software solutions for remote authorization and confidential communication using modern ciphers resistant to quantum computers, and environments for secure financial services, remittance, and the issuance, transfer, and use of digital cash such as Central Bank Digital Currency (CBDC), community and local cash, and digital securities. The company was formerly known as CIPHER-CORE, Inc. and changed its name to Siki Co., Ltd. in March 2026.

The company was incorporated in 1987 and is based in Tokyo, Japan.

Siki Co., Ltd.

Country	United States
Founded	1987
Industry	Software - Infrastructure
Sector	Technology
CEO	Takatoshi Nakamura

Contact Details

Address: 1-9-36 Konan Tokyo, Utah Japan
Phone	801 580 9928
Website	cipher-core.co.jp

Stock Details

Ticker Symbol	SIKI
Exchange	OTCMKTS
Stock Type	Common Stock
Reporting Currency	USD
ISIN Number	US1258083039
SIC Code	7990

Key Executives

Name	Position
Takatoshi Nakamura	Chief Executive Officer, President and Director
Motoyuki Odachi	Chief Operating Officer and Director
Masayuki Tsuda	Secretary and Director