Members

Spyridon Mentzas (Founder / CEO)

Spyro began his career as a programmer at Salomon Brothers Asia in 1995 and made substantial contribution to the front office launching the global program trading desk in the Equities Division. In 2003, he founded an IT consulting company. In 2007, he partnered with Mizuho Securities as a consultant overseeing the firm’s success in algorithmic trading and high frequency trading. In 2010, he joined Mizuho full time and was appointed Co-Head of Equities Division as well as Deputy Global Head of Pan Asian Equities. In 2016, he became director of the investment department, expanding into the FinTech world running due diligence and valuations of venture capital firms and startups globally, connecting them to various institutional investors mainly in Japan.
In 2017, he founded HiJoJo Partners.
Spyro graduated Columbia University with a degree in Engineering & Management Systems.

Tomohiko Hamada (Co-Founder / Managing Director and Head of Sales)

Hama joined Salomon Brothers Asia in 1991 working in the Equity Derivatives Trading Dept as an arbitrage trader. He then worked on promoting and the implementation of a Global Program Trading System. In 2000, at Credit Suisse First Boston, he joined the Global Portfolio Trading Group as Head of Japan and was responsible for rolling out new trading systems and developing new business to institutional investors. He is a pioneer in algorithmic trading, dark pool venues and advanced trading strategies in Japan. He has been consulting at Simplex Inc. since 2011.
He co-founded HiJoJo Partners in 2017.
Hama graduated Chuo University with a degree in law.

Hidekazu Sugiura (Co-Founder / Managing Director and Head of Systems and Consulting)

Hidekazu began his career at Fujitsu in 1997 with the International Sales Department and subsequently transferred to Systems Development Department to develop back office systems for securities companies. In 2003, he joined CLSA responsible for leading the firm’s implementation of equity trading systems. In 2005, he joined Simplex Inc. as project manager and successfully led large scale projects such as development of equity trading systems for top-tier securities companies and development of the Osaka Securities Exchange OSE-FX Exchange Trading System. In 2016, he launched Japan’s first inter-broker dark pool solution.
He joined HiJoJo Partners in June 2018 as a founding member.
Hidekazu graduated Aoyama Gakuin University with a degree in School of International Politics, Economics & Communication.

Hidenori Nakayama (Head of Compliance)

Naka began his career at Okasan Securities in Japan and London. He later joined Shroders Securities as a trader and was the trading desk head at various buy side institutions including Morgan Stanley Asset Management, Credit Suisse Asset Management and Franklin Templeton. In 2012, he served as an inspector at the Financial Services Agency (FSA) as a member of the SESC.
He joined HiJoJo Partners in December 2017.
Naka graduated Saga University with a degree in Economics.

Takashi Itoh (Head of Administrations)

Taka began his career as a system engineer and has worked in the IT department for the financial services industry since 1997. He has worked at top tier sell side institutions such as J.P. Morgan, BNP Paribas and Merrill Lynch for APAC technology and client solutions’ group in Futures & Options and OTC Clearing.
In January 2018, he joined HiJoJo Partners.
Taka graduated University of Oregon with a degree in Mathematics.

Geoff Macdonald (Director, Investment Advisory)

Geoff began his career at a market making firm during the .com bubble and moved to Japan in 1999 with Barclays Capital as a trader for the Equity Finance/Delta1 group. In 2004 he joined Mizuho Securities covering major international hedge funds as a salestrader for Japanese equities. In 2007 Geoff joined Nomura securities where he ran international salestrading post the Lehman and Instinet acquisitions. 2014 saw Geoff return to Mizuho Securities where he ran international salestrading globally.
HiJoJo Partners welcomed Geoff in 2018.
Geoff has a BA in history and psychology from Rutgers University

Kotaro Yamazawa (Advisor)

Kotaro joined the Bank of Japan in 1980 and was later appointed as Manager of Personnel Division for the Corporate Affairs Department, ultimately being appointed the Head of a subsidiary branch of the Bank of Japan. From 2006, he was seconded to the Osaka Securities Exchange as a senior executive officer. In 2013, he became a Senior executive officer of Japan Exchange followed by a role as director and vice president of the Osaka Exchange in 2015. He currently holds positions at the Tokyo Commodity Exchange (TOCOM) as a board member and at AEON Financial Services as an external auditor as well as various advisory roles at established Japanese corporations.
Kotaro graduated University of Tokyo with a degree in law.

Stelios Moussis (Advisor)

Stelios started his career by joining the European Union (External Trade Directorat, EU Commission) in 1994. He joined to DDB-Hoche in Brussels and Paris as an attorney-at-law in 1998 and then to Alstom as Contract Manager in 1999. In 2004, he joined Anderson Mori & Tomotsune (Tokyo) as Senior Foreign Counsel and then on to British American Tobacco Japan as Head of Legal. In 2012, he co-founded Xgemina, a HK FinTech startup (next generation banking switch technology) and its subsidiary Tortuga Mobile (mobile payments), funded with a USD2.5m angel investment. Since 2014, he has been a member of the management team and General Counsel of Alibaba Group’s Lazada Malaysia and Lazada Express, the leading e-commerce and logistics platform, serving a population of 640 million in South East Asia. Also covered helloPay, now part of Ant Financial (AliPay). In 2018, he became an advisor to HiJoJo Partners.
Stelios graduated King’s College London, University of London, LLM.

Chris Napoli (Advisor)

Chris Napoli currently serves as the Head of Global Trading for Eastbay Asset Management, LLC, a hedge fund in New York that manages over $1 billion in assets invested in the technology, media, consumer and disruptive tech sectors globally. Prior to joining EastBay, Chris co-headed International & cross-asset trading encompassing Global Equity, FX, fixed income, futures, and derivatives for Diamondback Capital’s center book. Prior to Diamondback, Chris worked as a Fixed Income trader for Incapital’s Treasury Alternative/Government Agency & Rates teams. Chris began his career at Merrill Lynch in the associate program.
He played 5 seasons for the Miami Hurricanes Football team.
Chris graduated with a BBA from the University of Miami in 2005 and earned an MBA in Finance from the University of Miami Graduate School of Business in 2007.