IOC Engaru 2023
Final Circular
IOC Engaru 2023 Official Website: https://sites.google.com/view/iocengaru2023/home
Post-Conference Excursion canceled for safety reasons
The post-conference excursion scheduled for 7 July at Ajisai Fall has been canceled. We
apologize for any inconvenience this may cause and appreciate your understanding.
Online Payment System via the JTB portal is now available
We have received your hotel booking request, but it needs to be reserved separately. Inorder to secure your accommodation, please follow the instructions provided on our JTB
portal: https://amarys-jtb.jp/ioc2023/.
This system will be operational from 1 May to 15 June. Kindly select your preferred hotel andthe duration of your stay in Engaru Town, and proceed to make the necessary online
payments.
Additionally, we kindly ask all participants to submit payment for their registration fees basedon their participation category.
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Regular presenters (both oral and poster): 20,000 JPY
Non-presenters (attendees without presenting a paper or poster): 10,000 JPY
Students (presenters and non-presenters): 10,000 JPY
Accompanying persons of presenters and non-presenters: 10,000 JPY
Online participants (all categories): 3,000 JPY

It is mandatory for all participants to access the portal and complete payment for the fees by
15 June 2023.
Conference Schedule and Presentation Program
Thanks to your valuable contributions, we have arranged a total of 60 oral presentations and24 poster presentations. We expect around one hundred attendees in total. You can accessthe latest conference schedule and presentation program through the following websites.
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Conference Schedule:
https://docs.google.com/spreadsheets/d/18yBUkv5g3UWa4zST3LV67ymKbPujcBOX
kyRdb0pUCbo/edit?usp=sharing●Presentation Program:
https://docs.google.com/document/d/1kd1MQOS7ssVVc88d1-8ImjZbzhdbyFOVSJrfq
cdLZt8/edit?usp=sharing

Presentation Guidelines
Oral presentations● Please bring your presentation file in the PPT format on a USB flash drive.

The session coordinators will collect the file from you prior to the start of yourpresentation session.
● Oral presentations are limited to 15 minutes, followed by 5 minutes of discussion.
Poster presentations● We are unable to fulfill any requests for poster printing. Kindly bring your printed
posters to the venue or ship them to the Engaru Metro Plaza in advance.
● We have decided not to conduct a brief presentation before the poster presentations.
● Students presenting posters are automatically nominated for the IOC student poster
awards sponsored by SAS.
● Poster presenters are required to display their posters by 1:00 pm on 3 July andremove them by 1:00 pm on 6 July.
●Access to Engaru Town
For attendees arriving in Engaru by JR trains, we highly recommend using the JR website(https://www.jrhokkaido.co.jp/global/) to plan your journey.
To search for the timetable, simply set your departure station as Sapporo or New Chitose
Airport and your arrival station as Engaru. This will provide you with the most effective andefficient train schedule to ensure a smooth journey to the conference.
Obsidian knapping workshop: exhibition for non-specialists
An obsidian knapping workshop will be held at the Engaru Metro Plaza on 2 July at 5:00 pm,
just before the Ice-breaker gathering. This workshop will be conducted by Drs. Kenji Nagai
from Aichi Gakuin University (Japan) and Han-Yong Lee from the Jeongok Prehistory
Museum (Korea) will demonstrate their excellent knapping skills to replicate ancient stone
tools using obsidian and other knappable stone materials. This is an excellent opportunity towitness the active production of ancient stone tools such as knives, arrowheads, andhandaxes. We cordially invite you to join us and experience the fascinating art of obsidianknapping.
Public Lecture
Engaru Town will hold a public lecture at 6:00 pm – 7:30 pm on 4 July. Dr. Robon Torrence in
the Australian Museum will be invited as a lecturer with a talk about "Rare, shiny and deadly:
why is obsidian so special?"
Since the beginning of human history, people living across the globe have made tools,ornaments, and ritual objects using a volcanic rock that geologists call ‘obsidian.’ Unlike
most other kinds of stone, which were mainly used near places where they occur naturally, it
was not unusual for pieces of obsidian to be transported very long distances, up to several
thousand kilometres away from their source. Why was obsidian so special? Why was thistype of stone so highly valued by many ancient societies? The talk will address thesequestions by surveying how cultural groups around the world have taken advantage of thespecial physical properties of obsidian: such as rare, shiny, and deadly.

1 May 2023
LOC for IOC Engaru 2023
Yoshimitsu Suda (geosuda@nagasaki-u.ac.jp)