||Kenji Kakihara, the current chairman,
established Jonan Steel Shokai in Omori-kita, Ota-ku, Tokyo,
to sell steel materials as a private management company.
||Jonan Steel Mill Corporation purchased land at 5-13-35
Ryoke, Kawaguchi city, and started to construct a new rolling
plant as a first phase of new mill constraction.
||The company built a steel making plant as
second phase of the construction. This plant started
production with a 20-ton electric furnace. The continuous
production system from the steel-making process to the rolling
process was started. Capital was increased to ￥48 million with
investment by Tokyo Small and Medium Business Investment &
Consultation Co., Ltd.
||Authorized to place Japan Industrial Standard (JIS)
indication on reinforcing bar steel.
||Continuous casting machine was
||The 20-ton electric furnace in the steel-making plant was
replaced by a 40-ton electric furnace, Rationalization of the
rolling line was done. Which cabled 15,000 tons of production
||The steel making mill and the rolling mill
achieved monthly production of 25,000 tons each.
||Rolling line and accuracy adjustment line were replaced by
new lines. Both the steel-making mill and the rolling mill
established 40,000-ton production systems.
||The continuous casting machine in the
steel-making plant was replaced by a new machine.
||The finishing rolling machine in the rolling plant was
replaced by a block mill.
||The oxygen generator was replaced by a new
one. The intermediate mill in the rolling plant was replaced
by a block mill.
||The plants achieved conformity with ISO 9001:1994 quality
system examination, and were certified and registered.
||The Purchasing Department purchased a iron
scrap radioactive ray detection monitor.
||The motors of the building dust collectors were changed to
inverter-controlled motors to achieve energy saving.
||The motors of the direct-suction dust
collectors were changed to inverter-controlled motors to
achieve energy saving.
||Authorized to place Korean Industrial Standards (KS)
indication on reinforcing bar steel. （KS D 3504）
||The plants achieved conformity with ISO
9001:2008 quality system examination, and were certified and