Hitoshi Ishihara has extensive focus and knowledge concerning the Japanese casino and gaming laws including the Japanese Integrated Resort (IR) Act, providing advice concerning the Japanese gaming regulations to various operators, suppliers, affiliate marketers, platformers, publishers, foreign law firms, state agencies, and various other stake holders, being quoted by Chambers as "Hitoshi is the preeminent gaming lawyer in Japan, and well recognised for his expertise in the international community of gaming lawyers".

He provides a variety of legal services to various international and foreign-affiliated clients establishing and doing business in Japan, with an exceptional focus on cross-border business negotiation, dispute resolution, M&A, international trade, and corporate/commercial matters (including advice concerning corporate governance, compliance, JV management, and internal investigations). His distinctive English skill, backed by over seven years experience in the United States, enables him to effectively bridge the linguistic and cultural gap faced by his clients.

Mr. Ishihara provides pertinent and timely advice that matches the needs of clients expanding overseas, utilizing his rich experience in negotiating and coordinating with clients and counterparts not only from the United States and EU countries, but also in various other jurisdictions including those counties in Asia, Middle East, South America, and Eastern Europe.

In the intellectual property field, Mr. Ishihara has extensive experience in IP licensing and transactions and also provides advice on regulatory issues especially in the entertainment field, with an exceptional focus in the field of sports, being only one of the two recommended Japanese lawyers in the field of Sports & Gaming by Lexology Index, being quoted “Hitoshi Ishihara maintains a first-rate reputation in the market thanks to his excellent cross-border business negotiation work in the sports industry.”