During this day in Japan takes place a huge, picturesque parade of costumes, so you will meet everywhere young people dressed in beautiful traditional attire. Girls are wearing furisode, a type of vividly colored kimono with very long sleeves, traditionally worn only by unmarried women, while boys are traditionally dressed in a dark kimono with hakama (but I also saw boys preferring modern costumes).
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 44mm
Aperture: F/5.6
Shutter Speed: 1/40s
ISO Sensitivity: ISO 200