From 1998 to 2007, Ms. Kazumi Teune worked to help raise funds to plant 1000 cherry trees in Fairmont Park, Philadelphia. She also contributed to the creation of a one day event called Sakura Sunday. The event, initially attended by only 20 members, has now evolved and became the 2nd largest festival in the Northeast, a week-long affair called Subaru Cherry Blossom Festival of Greater Philadelphia with over 20,000 participants including the Honorable Michael Nutter, Mayor of Philadelphia.

In 1986, the City of Philadelphia established a sister-city relationship with Kobe City, Hyogo. As there had not been any events to celebrate that partnership in a long time, Ms. Teune, Honorary Ambassador of Kobe to the United States, organized the 10th anniversary event for Philadelphia-Japan Health Science Dialogue in Kobe (2009) and the 25th anniversary event for Sister Cities at the Philadelphia City Hall (2011).

Ms. Teune played a key role as co-editor of the revised edition of Phila-Nipponica: An Historical Guide to Philadelphia & Japan which was originally published in 1999. This popular book enlightens its readers about the history of exchange between the people of Philadelphia and Japan.