At the beginning
nikoli.com is web site for paying members. Before you join, please try out our sample puzzle problems. If the sample problems don't work on your computer, you will not be able to enjoy newly released puzzles if you become a member.
If you can't play the sample problems, please see the "recommended environment" page on nikoli.com.
There may be cases of trouble depending on your computer settings even in environments where we have checked that the puzzles should work.
Registration of membership
You are required register to become a member.
There are a number of methods of payment for your membership. In either case make the registration from the form on the admission pages.
Before registration, please read the "Terms and Conditions" on the admission pages.
When you send an application for admission, we will assume that you have agreed to the "Terms and Conditions".
Payment by Credit Card
The monthly membership fee is Japanese Yen 550.
The effective term for a monthly membership fee is from the 11th of the month of admission till the 10th of next month. No matter what day of the month you are admitted, your date of registration is from the 11th of the month.
If you become a member on December 25th; the registration date is December 11th.
Becoming a member on January 5th; the registration date is January 11th.
You can access and solve puzzles from the 11th of the month prior to your admission. If you continue to be a member, your monthly payment will be withdrawn from your account about the 3rd of the month.
You may use any of these six kinds of credit card: JCB Card, Nicos Card, VISA Card, Master Card, American Express Card, Diners Club Card.
You may also use credit cards of other companies that carry the VISA or MasterCard mark. nikoli.com will not know the information on your credit card. Your information will be managed by Settlement Service Company for your security
Please note, new members will not be charged the first the first monthly payment by credit card. The monthly payments will only be withdrawn from your account from the second month.
* This only applies for new members of nikoli.com, people who join us the first time. You are not extempt from the first payment if you have been the member of nikoli.com before.
Payment by PayPal
The effective term of your monthly membership is from the11th of the month of admission till the 10th of the next month. No matter what day of the month you are admitted, your date of registration is the 11th of that month.
Becoming a member on December 25th; the date of registration is December 11th.
Becoming a member on January 5th; the date of registration is January 11th.
You can access and solve puzzles from the 11th of the month prior to your admission. If you continue to be a member, your monthly payment will be withdrawn from your account about the 8th of the month.
Changing a payment method
You can change your payment method at any time after becoming a member. Your member registration information will be kept by nikoli.com.