Climbing chalk is one of the gears that affect your performance.
In addition to friction performance and characteristics, depending on compatibility with skin, trouble, depending on the use environment, it is necessary to take into consideration powder / chunky / should included a ball or not, correspondence to scattering etc.
We think climbers supposed to be able to buy tokyo powder by gym or professional shop familiar is the best.
Available at over 400 gyms and pro stores in Japan