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March 29, 2015
ATL exhibited his technical service in UN World Conference on Disaster Risk Reduction which was held at Sendai Mediatheque (6th Floor) in Sendai, Japan on March 14 to 18. We thank all Japanese and international visitors to our booth. We attached all posters at the exhibition, in this HP.
The copy slogan in these poster were produced by the copywriter who was one of the finalist in No. 50 and 52 Sendenkaigi Award (Japanese Amateurs Copywriter’s Award).
April 10, 2015
Under instruction of Assist. Prof. Mitsuhiro Masuda of Tokyo University of Marine Science and Technology, Mr. Yoshihiko Fujita (student in master course), etc., implemented experiments of ATD model (in autumn 2014). The movie attached here shows that ATD was stood as sea wall by wave force immediately when the wave touched the edge of ATD (it seems not only by buoyancy of wood).
August 23, 2015
ATL experimented the model (1m width scale) of Anti-Tsunami Door(ATD), Anti-Tsunami Gate(ATG), Anti-Tsunami Raft(ATR) and Anti-Tsunami Support(ATS) at Disaster Prevention Research Institute of Kyoto University (Ujigawa Open Laboratory) on April 8 to 17 and May 11 to 13, 2015. As the results, ATL confirmed the following points: (1) Anti-Tsunami Door, Anti-Tsunami Gate and Anti-Tsunami Raft are functioned (stood like as sea wall) automatically by the wave. (2) Anti-Tsunami Door has a reasonable tsunami hazard reduction performance (80 – 90% of solid sea wall of the same height). (3) The lumber structure of Anti-Tsunami Door, Anti-Tsunami Gate, Anti-Tsunami Raft had proper strength to be functioned as tsunami hazard reduction facility in the flooded water.
September 6, 2015
ATL uploaded the movie of Anti-Tsunami Door (ATD) which was experimented at Kyoto University. The experimented ATD model was of 15cm height x 98cm width x 4cm thickness and the wave was soliton wave of 13 cm height. The results are that the wave height reduction efficiency in the experiment of the movie is 30.7% which is approx. 88% of that of solid sea wall of the same 15cm height (34.9%).
Feb. 15, 2016
On Feb. 5, 2016, ATL confirmed that 2 panels’ folding ATD was functioned properly as moved automatically (stood panel by panel sequentially) and worked well as breakwater of total of 2 panels height in the flooded water. Its wave height reduction efficiency is approx.. 80% of that of solid sea wall of the same total height. See the attached movie. Details of Experiment ATL performed experiments of 2 panels’ folding ATD at Kyoto University on Feb. 1 – 5, 2016. ATL checked the functioning of 2 panels’ ATD (10cm height x 91cm width x 25mm thickness x 2 panels). As you can see in the attached movie, the ATD was stood as folding condition firstly at the moment that the wave contacted the ATD, and then, after some wave got over the stood ATD, the second panel was floated from minus 90 degree angle to plus 90 angle of horizontal, and stood upon the first panel. The second panel was floated more than the top of first panel because of allowance of hinge between them. When the wave height is reduced to approx.. total height of 2 panels, the second panel became down to touch the first panel and when the wave height became less than the first panel height, the second panel felt from the top of first panel. These actions are matched with the concept of ATD where ATD will reduce the tsunami force by the its standing surface area (because ATD has small s pace at its both sides and is not water tight) and does not give any difference on the performance of wave height reduction by the fact that the second panel float more than the top of first panel. The tsunami wave height reduction efficiency of this 2 panels’ ATD when the ATD is standing, at the 16cm initiated wave is 61%. And the efficiency when the both of 2 ATD panels were standing sequentially from laid down position is approx.. 84% of that of solid sea wall of the same total height (i.e., 20cm). So it is considered that the wave height reduction efficiency for the long tsunami duration will be is approx.. 84% of that of solid sea wall of the same total height. This successful experiment results of 2 Panels’ Folding ATD indicated that the width of ATD laid down area could be reduced to at least 50% of total required breakwater height, so that ATD could be installed as compact.
Jan. 01, 2017

（１）1. On July 8, 2016, ATL successfully tested the performance of a 3-stage ATD. In that model, a new device was added for unfolding and erecting the 3-stage ATD. Please see the attached video.


（２）2. In September 2016, the Journal of Japan Society for Natural Disaster Science (Vol. 35, No. 2, 2016) published my paper, “Experiments of Wooden Automatic Mitigation Facilities,” in Japanese.

The following is the abstract of that paper, in English:

Tsunami mitigation facilities have been developed based on a new concept, in which the facilities are made of wood and will function automatically during tsunami flooding based on their natural buoyancy, instead of depending on electrically powered equipment. These are intended to provide a sufficient breakwater effect against tsunami flooding, while allowing some flood water to pass to the land side. This experiment was intended to confirm that the new tsunami mitigation facilities (named, Anti-Tsunami Door) will, in fact, function automatically during tsunami flooding and that the wooden structure has sufficient strength during flooding to reduce the tsunami impact by approximately 80-90%, compared to the protection provided by a concrete seawall. Anti-Tsunami Door might be applied in level 2 tsunami areas because it can be constructed like a folding screen with multiple panels (such as 5 panels, each 3 m in height, for a 15 m high tsunami) of inexpensive and environmentally friendly, reinforced wood.

（３）3. On September 21, 2016, E. Hamada presented the study results of his “Automatic Lumber Tsunami Disaster Reduction Facility’s Experiments” at the annual congress of the Japan Society for Natural Disaster Science. Please refer to the attached material (in Japanese).


（４）4. On December 15, 2016, E. Hamada presented the “Automatic Huge Tsunami Hazard Reduction Facility Development” at a business seminar for Environmental Veterans Farm (EVF). Please refer to the attached material (in Japanese).


In September 2018 and in Disaster Prevention Research Institute of Kyoto University, we (Anti Tsunami Laboratory; ATL) succeeded the middle-scale demonstration experiment of 3 Stages Anti Tsunami Door (Channel width : 4m , Anti Tsunami Door (ATD) height : 15cm x 3 , ATD width : 1.8m , 2 ATD sets in the channel). Please refer to the attached movie. This movie is the one of 1/4 slow.

Nov. 04, 2019
In September 2018 and in Disaster Prevention Research Institute of Kyoto University, we (Anti Tsunami Laboratory; ATL) succeeded the middle-scale demonstration experiment of 3 Stages Anti Tsunami Door (Channel width : 4m , Anti Tsunami Door (ATD) height : 15cm x 3 , ATD width : 1.8m , 2 ATD sets in the channel). Please refer to the attached movie. This movie is the one of 1/4 slow.