January as far as Cape Inubo and gather in the sea water near Kinkasan and Sanrikn in March 
and April, departing at last in May and June to the east coast of Hokknido, 
In the Japan Sea they come to the northern coast of Korea from January to March 
and near Oki Island and Sado, in April near Yamagata and Akita coasts and advancing in May 
to the west coast of Hokkaido and Sakhalin disturb schools of herring there. 
Wot only do they often destroy fishing nets, but they also inflict so much harm 
to fishermen, enatching fishes caught already out of the fishing apparatus; especially 
ereat damage is felt in the fisheries of cuttlefish, herring, sardine, Alaskan pollack, 
salmon and trout etc. 
Although we have no exact data to show the degree of damages concretely, we may 
estinate them as follows: 
If each fur seal takes each day, for food and playful bite, 5 pounds of fish, the 
above-mentioned 920,000 head of seals, staying around Japan seas during the period from 
November to June, will indeed devour the big amount of more than 730,000,000 pounds in all. 
2. Netinate of Fur Seal Damage to Fisheries, 1938 
(This report was worked out at the Bureau of Fisheries, Tokyo, in May 1946. As 
the 1936 number of Pribilof fur seals is not available, damage of the corresponding year 
[eee Item 1 explanatory statement] is unobtainable.) 
The estimate of damage (amount of food and bite) inflicted by fur seals on the 
side of Pacific Ocean in the year 1938 (13th year of Showa). 
Number of 
Amount of Damages 
Fur Seals (from bait and bite) 







Migrating Amount of 












in the Stay for 6 Months 
Pacific 
side. Value 
Total Humber Oriental per Total 
of Fur Seal eide. kg Value 
2 040 ,000 1,030,000 ]. 2,336,040 420 ,478,200 0.083 34,900 ,537 
APPENDIX D 
GLOSSARY 
@hanto peninsula 
~kaikyo straits 
maru vessel 
oni saki cape 
ottosei fur seal 
rakko sea otter 
ri 2.6 miles 
~saki cape 
shaku 0.99 foot 
sho 0.48 gallon 
-~shima island 
sun 1.2 inches 
taukimbo-sen specialized type of vessel used for hunting porpoise and seals 
~wan bay 
~zaki cape 
53 
