During 18-23 July, a workshop to bring together experts on High Energy Astrophysics from Japan and Israel was held. The first part (18-19 July) was held in RIKEN Wako, while the second part (22-23 July) was held in RIKEN Kobe IIB. The workshop was supported by iTHEMS.

This workshop was motivated by 3 things. One was Roger Blandford, a reviewer of iTHEMS AC, was planning to visit RIKEN Wako during 24-26 for the review. Second was Noemie Globus, who is a visitor of Astrophysical Big Bang Lab. (ABBL), was interested in organizing a meeting between Japan & Israel. She worked well as a Co-Chair of the meeting. Third was Hirotaka Ito (Chair, ABBL) has some collaborators in Israel, including Amir Levinson & Asaf Pe'er.

We enjoyed lots of excellent talks both from Japan & Israel. Roger Blandford gave a talk on his interpretation of the black hole shadow image by the even horizon telescope (EHT). We had lots of discussions with Israel people, and we agreed to proceed our collaborations on long/short gamma-ray bursts. We received many emails from Israel people that they enjoyed the workshop and their stay in Japan very much, and some of them proposed to have a second meeting in Israel.

Hirotaka Ito & Noemie Glogus worked very well as chairs of organizers. Thanks to them & iTHEMS, the meeting was very successful.

As a research activity of RIKEN iTHEMS and Kyushu Univ. collaboration, Dr. T. Doi gave lectures on his research, Lattice QCD and research activity on HAL QCD collaboration from 31th July to 2nd Aug.
In his lectures, approximately 25 persons who were mainly PhD students attended and had many discussion with him. It was very fruitful days for them.

A workshop on "Math of Jets" co-sponsered by RIMS (Kyoto University) and iTHEMS was held from July 29 to 31 at Kyoto University. Researchers from wide scientific fields, such as, planetary atmosphere, astrophysics, quark-gluon plasmas, and so on gave talks. The common keyword for participants are 'jet' and/or 'hydrodynamics'. Since most of participants use numerical hydordynamic or magnetohydordynamic simulations as a tool for their study, some part of discussions are devoted to introduce numerical technique, numerical difficulties and unresolved problems. We enjoyed getting to know research topics and problems in other research fields. At the workshop banquet, one of participants said as a speech "Recently the borders between countries have not been so high but the borders between scientific field have been getting higher and higher, event if they have common language, for example, 'hydrodynamics' like us. We should continue this kind of workshop. Otherwise, we can not understand each other in near future." The workshop was good opportunity to interact with other fields and we hope we will have next meeting in near future.