Nagashima Ohno & Tsunematsu dedicates its resources to resolving contentious matters, particularly on intricate and complex issues that test the realm of a patent's validity. Experienced partners Kazuo Ohtake and Takahiro Yamauchi are the key drivers of the team, often acting for chemical, biotechnology and pharmaceutical industry players in their cross-border litigation and arbitration against generic product manufacturers and alleged counterfeiters. The firm's other work covers a broad spectrum of industries and sectors, including the representation of a semiconductor company, a digital recording device manufacturer, a beverage and confectionery supplier and two television media companies.