On June 29, 2023, two papers by Professor Keitaro TAKAHASHI titled "The second data release from the European Pulsar Timing Array II. Customised pulsar noise models for spatially correlated gravitational waves" and "The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals" were published online and the research results were released to the press.
Click here for the details of the press release (in Japanese).