Shellmounds Distribution

Shellmounds in the town of Kasori,Kaizuka,Miyako,Sakuragi
iThe center part of Chiba Cityj

1.Kusakariba(L-F) 2.Kusakariba south(L) 3.Higashibeda(E) 4.Arayashiki west (E)
5.Arayashiki(M-L) 6.Ubagasaku(L) 7.Saikoin(E-M) 8.daimon(L-F)
9.Kidoba(E) 10.Mukoudai(E) 11.Kasori north(M-L) 12.Kasori south(M-F)

The characters in emphasis shows Jomon phases IC:Incipient I:Initial E:Early M:Middle L:late F:Fimnal

<<< What shellmound tells me. >>>

A small size shell mound with the diameter of 1 ~50m  is the site where the eaten shellfish was discarded. Such a small shellmound almost existed in the constant number. If the great shellmound like Kasori Shellmound or Arayasiki Shellmound (diameter over 100m) is a mere dust desertion place, followings are considered.

i. Chiba citizen liked shellfish crazily in Jomon period

ii. Giant or glutton had come to live

iii. Population increased abnormally

It seems to differ except for iii. Many kinds of stone tool and accessory are excavated at Chiba City shellmounds, although there is no mountain or wide river to get the stone in Chiba City. The stone tool are made of the raw ore of Gunma or Saitama, Hakone, Izu-Island. It is supposed that Chiba citizen bartered the dried shellfish made at great shellmound for stone tool or accessory. The great shellmound might have been the food factory of dried shellfish in Jomon period.

<<<Dried shellfish tastes good>>>
Although raw fish is a mainstream as delicious foods in present Japan, the dried fish or dried shellfish is unexpectedly tastily. Chiba citizen produced dried shellfish gathering it at the beach, boiling it with sea water in pottery and drying with the sunshine in Jomon period. By drying shellfish, it can be preserved and becomes delicious food by the disassemble of protein to amino acids. The people of landlocked area might be drawn to this deliciousness and become healthy by assimilating an appropriate salt. The people of the Gunma Pref. etc. might desire dried shellfish at that time. The worth of dried shellfish might have been high as healthy food. The dried shellfish was a precious thing as the ingestion resource of salt, not as a protein resource. "Salt" had not been manufactured when great shell mound was made (3,000B.C to 1,000B.C. in Chiba).

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