Duodenoscope lawsuits against Olympus and other scope makers claim the devices spread "superbug" infections that killed 35 people and sickened hundreds of others at more than 40 different hospitals worldwide. The lawsuits say the design of duodenoscope models leaves small nooks and crannies in the tip, which could transfer microbial contamination from one patient to another. A jury handed up a $6.6 million verdict in the first trial against duodenoscope makers in 2017. Olympus has settled other cases for undisclosed amounts, and more cases are pending.

This company has faced several lawsuits following revelations in 2011 that Olympus had filed false financial statements between 2000 and 2011. The scandal is one of the biggest financial frauds in Japan's history. The largest amount among these civil lawsuits was for a total of 27.9 billion yen ($273 million) in damages, paid to six banks.

The Green Supply Chain Corporate Information Transparency Index (CITI) evaluates consumer-facing companies that have a sizeable supply chain in China. The evaluation uses government supervision data and public information to assess the environmental management of their supply chains in China. This company received a score of 12.32/100 (retrieved 24 Nov 2023).

In 2016 this company agreed to pay at least $635 million to resolve separate criminal and civil investigations into kickbacks and foreign bribery.