During summer, there are several morning glory fairs in Tokyo, the most important being the ones held at Iriya Kishimojin Temple (in Taito-ku), at Hibiya Park, at Denzuin Temple (in Bunkyo-ku) and at Yasukuni Shrine, all of them in July.
This photo is from the Asagao Ichi, Morning Glory Fair from the Iriya Kishimojin Temple. There are dozens of stalls, displaying a large variety of asagao. The sellers are usually enthusiastic, but the stalls are covered and the air is hot and humid, so everybody needs a pause from time to time.
Travel Tip: Like the name says, the Morning glory is in full bloom only during morning, so when you visit a fair like this, plan to go there early in the morning.
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 24mm
Aperture: F/5.6
Shutter Speed: 1/20s
ISO Sensitivity: ISO 200