On June 3, 2010, International Legal Alliance Summit & Awards 2010 was held in Paris and Nagashima Ohno & Tsunematsu was awarded the Silver Award 2010 as the "Best Japanese Law Firm".

The ALB Japan Law Awards 2010, sponsored by Asia Legal Business (ALB), was held at The Ritz-Carlton Tokyo, and Nagashima Ohno & Tsunematsu won the following awards:

• TMT Deal of the Year: Bellsystem24
• Debt Market Deal of the Year: USJ Buyout Financing
• Equity Market Deal of the Year: Mitsubishi UFJ Global Offering
• M&A Deal of the Year: Nikko Asset Management & Nikko Citi Trust Sale
• M&A Deal of the Year: Panasonic-Sanyo Electric Acquisition
• Japan Deal of the Year: Mitsubishi UFJ Global Offering