1995
The Fifth Asia-Pacific Seminar on Climate Change is held in Sendai.
Sendai becomes a member of the International Council for Local Environmental Initiatives (ICLEI).

1997
The Sendai Helsinki City Seminar is held in Sendai.

1998

The Environment Congress for Asia and the Pacific '98 is held in Sendai.
The APEC Symposium on Environmental Education towards Sustainable Cities is held in Sendai.

1999
The Sendai-Helsinki City Seminar is held in Helsinki.

2001
Sendai participates in the Mayors' Asia-Pacific Environmental Summit, held in Honolulu.
Environmental Forum Sendai 2001-the Environmental International Conference is held in Sendai.
Sendai participates in the Asia-Pacific Roundtable on Sustainable Development (Phnom penh).

2002
Sendai participates in the World Summit on Sustainable Development, held in Johannesburg.

2003
The mayor of Sendai becoms a member of the ICLEI Executive Committee.
Sendai participates in the ICLEI World Congress and Executive Committee Meeting, held in Athens.

2004
Sendai participates in the ICLEI Executive Committee Meeting, held in Seoul.
The 1st International Conference of Green Purchasing is held in Sendai.

2005
The ICLEI Executive Committee Meeting is held in Sendai.

2006
The International Environment Workshop in Sendai is held.