Dear WTTC friends and colleagues,
We are pleased to announce that the 20th Workshop on Targetry and Target Chemistry (WTTC20) will be held August 23–27, 2026 in Nara, Japan. This will be an international scientific event highlighting advancements in solid, liquid, and gas targets used in accelerator-based radionuclide production, along with postirradiation chemical processing. As with previous workshops, WTTC20 will follow a lecture-style format in a single hall, fostering a network that transcends generations and regions through engaging discussions during presentations and informal interactions during breaks. A three-day summer school for students and early-career researchers will also be held at The University of Osaka in the days leading up to WTTC20.
The establishment of this biennial workshop took shape during the 5th International Symposium on Radiopharmaceutical Chemistry—the predecessor of the International Symposium on Radiopharmaceutical Sciences (iSRS)—held in 1984 in Tokyo, Japan. The first WTTC took place the following year in Heidelberg, West Germany. This year, 2025, marks the 40th anniversary of WTTC, and in 2026, the workshop will return to Japan—the country where its organization was formally endorsed by the international community. Notably, this will also be the first time WTTC is hosted in Asia.
We will meet in Nara, a city with over 2,000 years of history, often regarded as the birthplace of Japan. Nearby are Kyoto and Osaka—major cities known for their rich culture and strong academic presence, where many of our colleagues are based. We hope your time in Nara and your encounters with new friends will leave you with cherished memories.
We look forward to seeing you at WTTC20.
Sincerely yours,
Kohshin Washiyama & Kotaro Nagatsu, WTTC20 co-chairs
On behalf of the WTTC20 Local Organizing Committee
We are pleased to announce that the 20th Workshop on Targetry and Target Chemistry (WTTC20) will be held August 23–27, 2026 in Nara, Japan. This will be an international scientific event highlighting advancements in solid, liquid, and gas targets used in accelerator-based radionuclide production, along with postirradiation chemical processing. As with previous workshops, WTTC20 will follow a lecture-style format in a single hall, fostering a network that transcends generations and regions through engaging discussions during presentations and informal interactions during breaks. A three-day summer school for students and early-career researchers will also be held at The University of Osaka in the days leading up to WTTC20.
The establishment of this biennial workshop took shape during the 5th International Symposium on Radiopharmaceutical Chemistry—the predecessor of the International Symposium on Radiopharmaceutical Sciences (iSRS)—held in 1984 in Tokyo, Japan. The first WTTC took place the following year in Heidelberg, West Germany. This year, 2025, marks the 40th anniversary of WTTC, and in 2026, the workshop will return to Japan—the country where its organization was formally endorsed by the international community. Notably, this will also be the first time WTTC is hosted in Asia.
We will meet in Nara, a city with over 2,000 years of history, often regarded as the birthplace of Japan. Nearby are Kyoto and Osaka—major cities known for their rich culture and strong academic presence, where many of our colleagues are based. We hope your time in Nara and your encounters with new friends will leave you with cherished memories.
We look forward to seeing you at WTTC20.
Sincerely yours,
Kohshin Washiyama & Kotaro Nagatsu, WTTC20 co-chairs
On behalf of the WTTC20 Local Organizing Committee
