Yosuke Koike | 伊藤小池法律事務所

Yosuke Koike

Attorney at Law admitted in Japan
Dai-ichi Tokyo Bar Association

Yosuke Koike

We will do our utmost to leverage free ideas that are not bound by past cases. We are also taking the lead in new areas and border areas that traditional law firms are not always good at. If you have consulted at another law firm but didn’t get satisfactory result or are looking for a second opinion, please contact us.

Our firm is responsive and acclaimed gratifying rapid service from our customers. Powerful legal team of specialized lawyers, secretaries and paralegals support our customers. We are looking forward to your visit to our new office relocated in the spring of 2019. It is close to Yurakucho Station and Hibiya Station on each JR and subway lines, and The Peninsula Tokyo and Yurakucho Bic Camera. Please feel free to contact us.

If you can call us during business hours, we can respond quickly. We will ask you for an overview directly and explain the possible options, advantages and disadvantages, and the charge.

Practice Area​

IT and
Internet Defamation
We respond rapidly to online defamation including removal request, intellectual property such as copyright, Privacy right infringement etc. We have many successful results in: social network service trouble, impersonator, removal of articles regarding arrest report, removal of libel from Twitter, internet bulletin board such as 5 Channel, Bakusai and others, revenge porn removal and filing criminal complaint and arrest after specifying the assailant, removal of defamation and reviews without no reasonable basis, handling defamation of screen name and etc.
Entertainment and
Intellectual Property
Our well-experienced lawyer in entertainment field provide practical legal advice to production companies where rock bands and pop stars belong, management office, artists, agent and etc. Please contact us about contract related to music and film, management contract, intellectual property such as copyright, internet related issue, event management etc.
We support our clients flexibly to meet various needs such as drafting and reviewing contracts, confirmations on creating new businesses and legality, preparing various legal opinions, complying with laws and crises managements, research on the Act on the Protection of Personal Information and other laws and regulations, assisting general meetings of shareholders and the Board of Directors, transferring business, capitalization strategy, and preparing for listing. Our specialist lawyers from diverse backgrounds such as corporate legal firm provide rapid service based on extensive knowledge and experience. Our clients range from start-ups to listed companies. Depending on the amount of work and the content, you can choose the time charge basis, the fixed monthly fee or spot fee. Please feel free to contact us.
M&A and Finance
Legal affairs related to M&A, business transfer and finance, etc. are one of the firm’s focus areas. We have teamed up with lawyers from finance law firm to propose and provide optimal legal services according to the cases. We also handle due diligence regarding cross border M&A which includes many English documents and creating and reviewing English contracts.

Lawyer profile etc.​

Name of the firm
Yosuke Koike
Dai-ichi Tokyo Bar Association
Office Hours
Weekdays 9:30-21:00
We are also available even on weekends and holidays in case of emergency, so please contact us.
Inquiry Service
Same Day Consultation Available, Saturdays Available, Sundays and Holidays Available, Night Time Available (after 6pm), Telephone Counseling Available, E-mail Counseling Available, Women Staff Registered, Parking Available
Payment Plan
Installment Payment Accepted, Later Payment Accepted, Without Retainer Fee Accepted, Only-Contingent Fee Accepted
Educations and
Keio University, Faculty of Law, Department of Politics
Waseda Law School
Stanford Law School
Masaki Ito page
Business hours   10: 00-21: 00


-Business hours
 10: 00-21: 00