Does anyone know? Katsumoto? What doctor calligrapher? I feel a little exaggerated. Please tell me.

Look for it on the list of China Calligraphers Association, and you will know if there is a name. Generally, those with names in China Calligraphers Association are well-known calligraphers in China. Don't believe in titles or anything. There are many people who pretend to be intellectuals, such as doctors who travel to the United States. Seeing whether his works have artistic standards is the real appraisal method. No matter what his title is, as long as the work has no artistic level, it will pass.