In 2001, the first year of this century, the scientific meeting of the Japan-Hungary Surgical Society was held in Budapest, Hungary, for the first time, under the incredible leadership of Prof. József Sándor and late Prof. Masaki Kitajima. The 2nd scientific meeting was held in 2006 in Tokyo after the Global Alert of Severe Acute Respiratory Syndrome (SARS) in 2003. The 3rd to 5th, scientific meetings were held every second year. In 2014, with the guidance of Prof. Grzegorz Wallner and Prof. Wojciech Kielan, the Japan-Hungary-Poland Surgical Society was established and the 6th scientific meeting was named “Triangle Symposium 2014” and held in Tokyo. The 2nd Triangle Symposium (Lublin, Poland in 2016) and 3rd Triangle Symposium (Budapest, Hungary in 2018) were took place successfully and fruitfully. Our future was shining and time passed quickly. However, in 2019, our society was stricken by the death of Prof. Kitajima, followed by COVID-19 pandemic. We were enveloped in darkness and time stopped.

In 2020, “Masaki Kitajima Memorial Symposium” was held as “The Fourth Triangle Symposium of the Japan-Hungary-Poland Surgical Society” on line (President: Prof. Yuko Kitagawa). During the quarter century, I have always felt the tight academic friendship among surgeons in Hungary and Poland. I have no choice. We continue to develop our academic friendship. We start again and take in every new factors for getting driving force so that we keep the tradition and create the innovation.

This is the first triangle meeting in Nagoya which is the most vibrant city in Japan. Surgeons from Hungary and Poland will feel the new aspects of Japan, and please be sure to join the excursion. We will take you to the scenery of beautiful islands in Ise‐Shima. We very much look forward to greeting you in Nagoya and confirming and developing the academic friendship.