In this site, what you can do in the state of the guest without user login is as follows.
Online shop related
Product specifications are available for detailed specifications.
You can compare selected products.
It is possible to put the product in the cart.
At the time of order processing, you can register as a new user.
Most articles are viewable as a guest.
You can view articles submitted to Forum in silico.
You can not post articles.
User registration and login are required to post articles.