In order to use the Chunagon online reference tools for the Corpus of Historical Japanese (CHJ), a subscription is required. Please subscribe using the following application form.
First, you fill out the subscription form. Second you receive a 'verification code' via SMS (Short message service) or postal mail. Third, you enter the "verification code" for the form. After that you can use the Chunagon services.
If you have already had the account of 'Chunagon', CHJ corpus can be added on your account after logging in.