Along with this
On the 9th of April, the original test area was
-1-
Survey trip, preparation of manuals covering radiation measurement and regulations pertaining to public dissemination
of the survey results. These recommendations were tinalized
by the Radioactivity Countermeasure Headquar ers.
The operation unit of this group, gradually formulated
recommendations in regards to the operational aspects of the
In order to complete executive planning and to promote
the survey trip, the Survey Vessel Dispatch Group was organized on the 15th of May by the Ministries and Agencies
concerned, aided by individuals possessing knowledge and
experience within this field.
During this period the Radioactivity Countermeasure
Headauarters, in conjunction with the Fisheries Agency,
decided to send one of the Agency's survey vessels, the
Shoyo-Maru, to the test area to perform the surveys and
tests necessary to fulfill the second requirement.
sequent to 25 April, at the Tsukiji Fish Market.
survey vessel to the test area in order to determine the
exact amount and extent of radioactive fallout and contamination within the mid Pacific area. To fulfill the
first requirement, tne Tokyo Metropolitan Government, started a sample survey of fish acquired from the test area sub-
Fisheries Agency, concerning plans to send a radiological
program during the resumption of nuclear tests, to conduct
a survey of fish, available in Japan, that were acquired
near the test area. Also, discussions were held with the
a meeting and decided, as a part of the radiological safety
During the test period, a total of 36 nuclear devices
were detonated. In view of the JERRIN PEP3c tonations,
the Radioactivity Countermeasure Headquarters of Japan held
Island, established.
partially enlarged and another test area, near Johnston
outlined.
announcement, the testing area, near Christmas Island, was
on the Sth of April in the Pacific area.
Statement that testing of nuclear devices would take place
On the 4th of April 1962, the United States issued a
HISTORICAL
The S.V. Shoyo-Maru was renovated and equipped with the
®
Name
and
health physicist
Ship doctor
and radiation
oth r marjne
biologica
Specimens
plankton and
ampling and radfoaot iW iey"
measuremen
in
air and rainwate
Radioactivity
measurements of
oO servaty ong
measurements of
sea water and
Sampling
radioactivity
environmental
radioactivity
Measurements_of
Duties
Director of
operation
PRIVACYACT MATERIAL REMOVED
—-2—
and members of the crow issist—
Captain
63 well
ed the survey team members in oceanographic observe*iois
as biological sampling.
National Institute of
Radiological Sciences
Fisheries Agency
Seikai Regional Fisheries
Research Laboratory,
National Institute of
Radiological Sciences
Japan Hydrographic Office
Institute of Physical and
Chemical Research
Naikai Regional Fisheries Research Laboratory, Fisheries
Agency
Parent Organization
Scientific Personnel Assigned to the Ship
cal and meteorological samples for radiochemical analysis.
““diation contamination and to collect biological, oceanographi-
OPERATIONAL
The operational cruise, conducted in the waters adjacent
_to Johnston and Christmas Islands, was designed to survey ra-
trip.
ni departed from Takeshiba Pier, Tokyo, for the scheduled 55 day
necessary instruments and equipment. On the 27th of July 1962,
. -the S.V. Shoyo-Maru with a specially assigned Survey team,
-f
PRIVACY ACT MATERIAL REMOVED
PRIVACYACT MATERIAL REMOVED