竹島

stum皿gxvorkel･8 to the islands、 ln 1907，he began tc
coUect eorals. ln 190S，he launched another enterprjs6
of canning sea-birds， To expa刀d a small-scale bonjtc
貧shing started in lS84，he l〕uUt 3 ocean嘔dng ships o刀
the main】and of Japan， jn 1905， Next vear， he con
structed another 5 ships. And everv veilr， he commanded
2 or 5 bonito ships. （Apart from th凪he built 5 eoral･
coHecting boats on a yearly ayerage.）For then!anu
faμure of dlヽled bonito，he invited several dozens of
speclalized wol･kers flヽom the Mlyazaki Prdecture.
　　 The business actjvity of Koga extended to the mining
of guano. ln ］907.he asked for a mlning ight over
the Senkaku lslands with the Mining Captain at Fukuoka.
This request was admi牡ed on August 19. the same year･
Koga proceeded lmmediately tQ the guano excarvation，
which eontlnued untU 1925， when the Flrst World xVar
caused a sudden upheava】tn flヽeight cosl.
　　 Upon the death of Tatsu311iro Koga， his bushless
activlties passed lnto the hands of hls elder so°. Zenji.
L田nberjng.dl･1ed bonlto andsea-bird plumage were the
most prosperousbuslness on uotsri-jima and M弛ami’
kojimajnpa以1°lar. At唸e height of Ze司iKoga’sbu略
n｡sg 。nterDrlse.died bonito workers counted about 80，



and plum昭e craftmen were 勿to和by number. on the
two islands. Theplumage work was abandoned in 1914.
0bllged partbrby an abllslve catch ・sea,blr〔ls nndparUy
by a proliferation of cats， birdそaters.Drled bQnlto
nlanufacturewas closed sho践ly be･fQre the Pacinc VVar，
obUged thjs time by Ule ration system for ship fuel.
　　 ln 1925，theland佃asegTanted to Tatsushlro Koga on
gratuitous basis， this lease saw its termj皿atlon.And
the Government concluded a contract of yearly renewal
with ZenJi Kop. who leおdlhefQurS幽teowned blands
with a rent of 136.61Ten，from September 1925 10
August 1931. At the sollcitatlon hy Koga， lhe Govem-
ment soLd the foulヽjslands to him at the pl･ice of l.S25
Yen fo1･ Uotsurlづ1ma. 247 Yen for Kuba-jima， 47 Yen
ror Mi皿m1-kojlma and 31.50 yen for K11a-koj1πg，on
March 31， 1932.The transfer of prQFiほary rlght8 w皿
釦ly regはered on May 27， 1932 恥r uotsurl-jkna and
Kubajima. and on July 28. the ame yar. for M㎞a°i-
kojima and Kjta-kojima. The four slands.noiy under
private ownership.became taxable as suぐh.The l蘇sular
rental valuaUon was 艮xed at 9.30Ten on December 15，
1932，andthelandpropertytaxwaaciealatedonChlsbasis、
rha lJwN0.36.0fJunel，1936 revied the land rental