Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Character | English version | Laserdisc edition | Buena Vista edition | Special edition |
| --- | --- | --- | --- | --- |
| Br'er Rabbit | Johnny Lee | Masashi Ebara | Shigeru Chiba | Koichi Sakaguchi |
| Br'er Fox | James Baskett | Tokio Seki | Toshio Furukawa | Yuji Tanaka |
| Br'er Bear | Nick Stewart | Shigeru Ushiyama | Daisuke Gouri | Hidehiko Ishizuka |
| Br'er Frog | N/A | Minoru Uchida | Naoto Takenaka | Yutaka Aoyama |
| Br'er Turtle | N/A | Kei Yoshimizu | Hiroshi Ito | Hiroshi Ito |
Question:
who is the buena vista edidtion where special edition is koichi sakaguchi?
Answer:
Shigeru Chiba