Some cool Water Purification images:
Hikawa Jinja: Shide & Shimenawa
Image by jpellgen
I am not sure if this is supposed to be a chozuya or tsukubai. Tsukubai is similar to chozuya in the sense that it is for purification. One uses a chozuya to purify their hands and mouth before entering a temple/shrine, and the concept of the tsukubai is the same only in reference to tea houses (usually). It literally means "stooping basin," and as you can see here one much bend down to use it. The star of this photo, to me, was the rock with shide (paper) and shimenawa (rope) around it.
Hikawa shrine is perhaps the most important Shinto shrine in Kawagoe. The history of the shrine dates back to the 6th century and the grounds contain tree which are several hundred years old. It is famous for its Edo period architecture, particularly wood carvings by Matsudaira Naritsune. It is also known to be a shrine for married couples.