IR/To Our Stakeholders

Topics

Business Performance for the First Quarter of Fiscal Year 2011(on a consolidated basis)

Business Performance for Fiscal Year 2010(on a consolidated basis)

Announcement of Exhibition to PV JAPAN 2010

Business Performance for the First Three Quarters of Fiscal 2010(on a consolidated basis)

Business Performance for the First Two Quarters of Fiscal 2010(on a consolidated basis)

Taiyo Nippon Sanso Shenwei (Shanghai) Medical Gas Co., Ltd. Established

Business Performance for the First Quarter of Fiscal 2010(on a consolidated basis)

Market launch of new high-performance nitrogen gas generator

Joint Monosilane Gas Production Project with Evonik Degussa Japan Co., Ltd.

Business Performance for Fiscal 2008 (on a consolidated basis)

Matheson Tri-Gas to acquire largest independent industrial gas distributor in United States

Business Performance for the First Three Quarters of Fiscal 2008 (on a consolidated basis)

Business Performance for the First Two Quarters of Fiscal 2008 (on a consolidated basis)

Notice Regarding Conclusion of Share Buyback by Taiyo Nippon Sanso Corporation.

Matheson Tri-Gas,Inc. Acquires Aeris,Inc.

TNSC,IMEC to collaborate on green LED manufacturing technolog.

Operation started at Yahata Kyodo Ekisan's first air separation plant.

Accounts Settlement for the First Quarter of Fiscal 2008(on a consolidated basis).

INGASCO again receives Supplier Appreciation Award.

TNSC acquires silane gas refilling companyin Yizheng City, Yangzhou, China.

National Oxygen receives excellent supplier award in Singapore and Malaysia.

Verification of biogas concentration unit that uses "membrane / absorption hybrid method" at field test.

TNSC Establishes Investment Company in China.

Business Performance for the Fiscal 2007(on a consolidated basis).

Group member NS Engineering to take over semiconductor gas equipment sale and installation operations from Saan Engineering.
- NS Engineering to be renamed Taiyo Nippon Sanso Engineering -

IBM and Matheson Tri-Gas to Collaborate on Semiconductor Manufacturing Technology.

Southern California Industrial Gas Distributor Becomes Part of TNSC Group.

TNSC Puts Low-Cost Biogas Refining Unit on Market.

Notice of Partial Amendment of Articles of Incorporation.

Important Notice Regarding Basic Policies for Control over the Company and Countermeasures Against Large-scale Acquisitions of the Companyfs Shares (Takeover Defense)

Ceremony Marks Completion of Ingasco's Second Air Separation Plant.

Notice Regarding Acquisition of Own Shares by Taiyo Nippon Sanso Corporation.

Summary of Business Results for the First Three Quarters of Fiscal 2007.

NOX Celebrates Start of Operations of No.3 Air Separation Plant and Company's 25th Anniversary.

JV Set Up to Supply Industrial Gses to Sakai Plant of Sharp Corporation.

Business Performance Figures for the First Half of Fiscal 2007 (April 1 to Sept. 30, 2007) on a Consolidated Basis.

TNSC hosts science event for children.

Helium Production by US Joint Venture to Start in 2009.

Construction of Kure Gas Center filling station completed.

TNSC to Supply Gases in Changxing Island Harbor Industrial Zone.

TNSC receives an award by METI for contributions to the protection of the ozone layer and a fight against global warming.

Summary of Business Results for the First Quarter of Fiscal 2007.

National Oxygen Pte Ltd. awarded The Minister for Defense Award.

Saantec Yamakawa and Kansai Saan Gas to Merge.

TNSC and SKC sign investment agreement with Ulsan.

New Plant Construction Completed at Oita Sanso Center

Business Performance for the Fiscal 2006 (on a consolidated basis)

Further Acquisitions of ISO 9001 Certification

Matheson Tri-Gas begins operation of large scale air separation plant in Southern California.

Three carbon dioxide subsidiaries to merge

Summary of Business Results for the First Three Quarters of Fiscal 2006

Notification of Cancellation of Shares in Treasury

TNSC Obtains Blanket ISO14001 Certification

TNSC Launches Low-Energy PSA-Type Nitrogen Gas Generator

Construction of package gas filling station completed in Osaka

Business Performance for the FY 2006 First Half

Revised Forecasts for Business Performance for Fiscal 2006

Summary of Business Results for the First Quarter of Fiscal 2006

70Mpa/35MPa Mobile Hydrogen Station Development

Taiyo Nippon Sanso Corporation to purchase Helium business

Taiyo Nippon Sanso acquires mid-sized U.S. industrial gas manufacturer Linweld Inc.

Business Performance for the Fiscal 2005(on a consolidated basis)

TNSC's FY 2006-2008 Medium-Term Business Plan

Notification of Change in Top Management Positions

Ingasco Receives Supplier Excellence Award 2005 from Analog Devices, Inc.

National Oxygen Pte. Ltd. Receives Gold Materials Supplier
Award from Chartered Semiconductor Manufacturing

Summary of Business Results for the First Third Quarter Of Fiscal 2005 (on a concolidated basis)

TNSC to acquire Hitachi Oxygen

New Cover Gas to be Adopted for Die-Casting Production of Magnesium Parts

TNSC to Acquire Management Control of Nippoku Sanso K.K.

New Plant Completed for Vietnam Japan Gas ( VJG )

Merger of Three Sales Companies in the Medical Gases and Equipment Field

Summary of Business Results for the First Quarter of Fiscal 2005 (on a consolidated basis)

TNSC Group's Carbon Producers to Merge

Shanghai Taiyo Nippon Sanso Completes New Plant

Business Performance for the Fiscal 2004 (on a consolidated basis)

Summary of Business Results for the First Three Quarters of Fiscal 2004 (on a consolidated basis)

All JFP Plants Receive ISO14000 Certification

Two Subsidiaries of TNSC to Merge in April

Report on Business Performance for Fiscal 2004 First Half