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World War I

    Establishment of
various new
industrial facilities

Teijiro Inoue made up his mind to become an independent self-employed businessman (and later made the day of his decision the company’s Foundation Day)
Established Sanseisha in Shinagawa, Tokyo, setting up Japan’s first corrugated board business
Coining of the Japanese term for corrugated board, “danboru,” which is still used today


Great Kanto

Taisho Democracy

Five companies merged to form Rengo Shiki K.K., capitalized at ¥2 million
Acquired Nippon Seishi and renamed it the Chifune Plant
The head office, Tokyo Plant and other facilities were destroyed by fire after the earthquake, and the head office was relocated to Osaka


Expansion of

"February 26

World War II

Completed construction of the Yodogawa Plant, which produced all products in an integrated manner, from containerboard to corrugated board
Met a wider range of demand that included home appliances, canned foods, bottled beer, ceramics, and clothing
Established new plants and subsidiaries in Korea, Taiwan and China
Formed a capital tie-up with Tokyo Electric (now Toshiba)


Pacific War
Promulgation of
the Constitution
of Japan

Outbreak of
the Cold War

Production to meet
military demand
under wartime
economic control

Six domestic plants were destroyed by fire during air raids, and overseas assets were lost
Resumed production to meet consumer needs and developed new demand for corrugated board used to package frozen whale meat and canned foods
Obtained a listing at stock exchange and increased capital to ¥10 million


San Francisco
Peace Treaty

"We are no longer in
the postwar period."

Home electric
appliance boom

Corrugated packaging was increasingly used for mandarin oranges, apples, and frozen fish.
Developed new corrugator and printing machine models
Modernized production equipment to meet growing demand
Opened Research Laboratory (later, Central Laboratory)
“Ruten” boom as Teijiro Inoue’s autobiography was adapted for TV and film


Trade liberalization
Tokyo Olympic

Japan attains world's
second largest GNP
Built Tonegawa Mill, as well as new corrugated products plants
Introduced technology from the United States as the functions of corrugated boxes diversified
Developed GRAVIAN and other pre-printed corrugated boxes
Technological innovations for production equipment advanced

Japan World

Plan for the
remodeling of the
Japanese archipelago

First Oil Crisis

Second Oil Crisis

Rengo Shiki K.K. renamed Rengo Co., Ltd.
Developed CORFLEX five-color pre-printed corrugated box
Installed No. 4 paper machine at Tonegawa Mill
Developed continuous running technology for corrugator operation
Developed and commercialized “Fingerless Single Facer”
Exported Rengo’s technologies for producing paperboard and corrugated board


Recession caused
by the strong yen

economic boom

Cold War ends with
collapse of
the Berlin Wall

Expanded business to cover nonwovens and other peripheral areas
Opened new office in Singapore for overseas expansion
Established new joint-venture corrugated products companies in Malaysia, Singapore, and Thailand


End of "bubble

Multiple recessions
Great Hanshin-
Awaji Earthquake

Creation of the
euro currency

“Lost Decade” and
zero interest policy

Opened Packaging Technical Center
Acquired Fukui Chemical Industry, an affiliated company
Completed an integrated production management system using computers
Set up new containerboard and corrugated products joint venture companies in China, Indonesia, and the Philippines
Incorporated Howa Sangyo into Rengo Group to enter the flexible packaging business
Acquired Settsu to reinforce the integrated paper and corrugated board production system


structural reforms"

Terrorist attacks on
the United States

Massive tsunami off

Beijing 2008 Olympics

Steep rise in the
prices of crude oil
and other resources
Global financial crisis
Global recession

Made Marusan Paper Mfg. Co., Ltd. a group affiliate
Commenced reforms in the paperboard and corrugated board industries
Introduced C-flute corrugated board
Bolstered energy conservation equipment, including biomass incineration power plant
All paper mills and corrugated plants acquired ISO 14001 environmental management certification
Installed a solar power system at the Kyoto Plant
Shin-Kyoto Plant commenced integrated production of corrugated board/boxes and folding cartons after merger of the Kyoto and Katsura plants
Rengo’s 100th anniversary
Made Nihon Matai Co., Ltd. a group affiliate


World Expo 2010

Great East Japan


New paper mill, a joint venture in Vietnam, begins full-scale operation

Completed construction of the Fukushima-Yabuki Plant that cuts CO2 emissions by 40%, compared to its predecessor

Completed construction of the Shin-Sendai Plant in about a year after its predecessor, the Sendai Plant, suffered extensive damage in the Great East Japan Earthquake
Completed construction of the Shin-Nagoya Plant—which features one of Japan’s largest seismically isolated automated warehouses—
in Kasugai-shi, Aichi Prefecture