一般財団法人
アショフ・ホンマ記念財団
general Incorporated Foundation
Aschoff and Honma Memorial Foundation
Last updated 2026/10/8
Sapporo Symposium
on
BIOLOGICAL RHYTHM 2026
Hokkaido University Conference Hall
September 11 - 12, 2026
生物リズムに関する札幌シンポジウム2026を
2026年9月11日（金）12日（土）に
開催いたします
9月11日午後には
アショフ・ホンマ賞の授賞式ならびに
記念講演とシンポジウムがあります
詳細は随時掲載いたします
Sapporo Symposium on Biological Rhythm 2026 will be held on September 11th and 12th.
The Aschoff and Homma Prize ceremony, commemorative lecture, and symposium will be held on the afternoon of September 11th.
Details will be posted as they become available.
.jpg)
There was active discussion and exchange of opinions at the Symposium, and proceedings ended in great success.
See you again at the next SSBR.
ご参加いただきありがとうございました。次の札幌シンポジウムでまたお会いしましょう。
開催要項
1. 日程：2026年9月11日（金）～12日（土）
会場：北海道大学学術交流会館
(札幌市中央区北8条西5丁目)
2. 登録：登録フォーム（click）に必要事項を記入の上送信ください。
登録期限：9月10日（当日受付もいたします。）
3.参加費：一般・15,000円（大学生・大学院生・10,000円）
(登録料・要旨集代）
※参加費は9月11日にシンポジウム会場（北大学術交流会館）受付にて現金でお支払いください
4. ランチョンポスター ※応募期間は終了しました
シンポジウムに登録後、
ポスター発表申し込みフォームより
お申し込みください
応募期限：6月30日
ポスターサイズ：W80cm x H140cm以下
北大学術交流会館ホールに展示します
※9月12日（土）のお昼は軽食と飲み物がつきます（無料）
5. アショフ・ホンマ賞 受賞祝賀会
日時：9月11日（金）19：00～21：00
場所：ホテルマイステイズ札幌アスペン
6. ビザ
VISA申請に必要な書類（招待状、証明書など）が必要な参加者は、登録フォームに記入欄があります
7. 事務所
一般財団法人 アショフ・ホンマ記念財団
〒064-0915
札幌市中央区南１５条西１５丁目1-30ベルビル５階
General Information
1. Date: September 11-12, 2026
Venue: Hokkaido University Conference Hall
Chuoh-Ku, N 8, W 5, Sapporo,
Deadline: September 10.
※September 11～ at the conference desk
3.Registration fee: 15,000 JPY (Student 10,000 JPY)
(Inc. Abstract)
※Payment: on the registration desk at the symposium (September 11, 2026) We accept cash only.
4. Luncheon Poster
※Poster presentation deadline has passed.
※Please register for SSBR before applying.
Luncheon poster application Form
Deadline: June 30
Poster Size: W80cm x H140cm or less
Display for 2days (Sep 11-12).
Lunch box and beverage included.
5. Aschoff and Honma Prize
Awarding Party
（Included in Registration fee）
Date: September 11 (Fri) 19：00～21：00
Location: Hotel Mystays Sapporo Aspen
6. VISA
The participant who needs documents for VISA application (ex. invitation letter, certification)fill out the registration form.
7. Office
Aschoff and Honma Memorial Foundation
Chuoh-Ku, S 15, W15, 064-0915 Sapporo, Japan
Sapporo Symposium on Biological Rhythm 2026
Program
September 11 Awarding Ceremony
12:00 Registration
13:00 Opening Address Yujiro Yamanaka
Report by the chairperson of ISC
Russell Foster, the chairperson of ISC
13:05 Awarding
Ken-ichi Honma, the chief of SSBR, to Hiroki Ueda
13:10 Awarding Lecture
Chairperson: Ken-ichi Honma
Hiroki Ueda
Why do we sleep? The Role of Calcium and Phosphorylation in Sleep
14:00 Coffee Break
14:15 Memorial Symposium“Circadian Rhythms and Sleep”
Chairperson: Sato Honma
Daisuke Ono
cAMP signaling links sleep–wake circuits and the circadian clock
Kazuhiko Kume
Mouse models of internal desynchronization provide insights into
the pathophysiology and treatment of circadian rhythm sleepwake disorders
Kazuhiro Yagita
Programmed gatekeeping of maternal-fetal communication during mammalian circadian development
16:15 Coffee Break
16:30 Memorial Lecture Chairperson: Masao Doi
Russell Foster
Photoentrainment: From Pittendrigh to New Therapeutics
18:30 Celebrating Party Hotel Mystays Sapporo Aspen F2
September 12 Sapporo Symposium on Biological Rhythm
8:45 Plenary Lecture 1 Chairperson: Kazuhiro Yagita
Ken-ichi Honma
The last massage from the pope, Colin S. Pittendrigh
9:15 Symposium 1 “Rhythm Entrainment: Master-Slave Interaction” Chairperson: Takashi Yoshimura
Yujiro Yamanaka
Behavioral feedback action modulates coupling strength between evening and morning oscillators in mice
Tomoko Yoshikawa
Feedback effects of wheel-running activity on the circadian pacemaker ―A role of CaMKII α
Dong-Gen Luo
A biochemical firewall insulates the circadian clock from electrical resetting
10:45 Coffee Break
11:00 Plenary Lecture 2 Chairperson: Tokitaka Oyama
Carl Johnson
Insights into Pittendrigh’s insights from bacteria
11:45 Get-together photo at Central Lawn
12:00 Luncheon Poster
13:30 Symposium 2 “Circadian Pacemaker: Evening and Morning Oscillator Model”
Chairperson: Shinobu Yasuo
Taishi Yoshii
Morning and Evening oscillators reside in the 240 pacemaker
neurons of the fruit fly, Drosophila melanogaster
Yasufumi Shigeyoshi
New perspectives on Morning and Evening oscillators in the SCN
Qiguang Xie
Cis-Regulatory architecture of PSEUDO-RESPONSE REGULATOR 9 and Its role in the integration of the plant circadian clock and environmental signalling
15:00 Coffee Break
15:15 Symposium 3 “Seasonality: Internal and External Coincidence Model”
Chairperson: Takahiro Nakamura
Takashi Yoshimura
From Pittendrigh’s coincidence models to seasonal precision medicine
Wataru Nakamura
Experimental evidence for internal coincidence in mammalian reproductive timing
Tokitaka Oyama
Variations of clocks and photoperiodic responses in plants: With reference to duckweeds
Xiaodong Xu
LNK1, LNK2 and COR27, COR28 regulate diurnal expression of FKF1 during photoperiodic flowering in Arabidopsis
17:15 Coffee Break
17:30 Plenary Lecture 3 Chairperson: Wataru Nakamura
Gene Block
The scholar and the snail: The enduring contributions of Colin Pittendrigh and bulla gouldiana
18:30 Closing Address: Ken-ichi Honma
