Already choosing ahamo? Enter Rainbow by August 31.

Know what the campaign gives—and what it does not

Rainbow and ahamo are inviting users to help set the length of a new comedy sketch. The current phase is an entertainment benefit, not a mobile-plan rebate, data bonus, dPOINT grant, or guaranteed physical prize.

• Support through a d Account runs from July 6 to July 31. One support action per account per day counts toward the shared video-length target.
• Entry runs from July 6 to August 31. One support-and-entry action is enough to enter the subscriber benefit; daily support is optional.
• Eligible entrants receive access to the completed full sketch at the length reached by the community. Separately, five signed props and five signed cheki photos are planned for 10 winners in total.
• The campaign page plans the viewing email and prize delivery for around October 2026. Do not treat either the draw or its timing as guaranteed savings.

Make the phone plan decision before the campaign decision

A short-lived comedy benefit should be a bonus after ahamo fits your resident phone needs. The current standard plan is 30GB for 2,970 yen per month with five-minute domestic calls and up to 30GB of overseas data within ahamo's conditions.

• Good fit: you already need a Japanese number and carrier SMS, expect to use roughly 30GB, accept online-first support, and enjoy Rainbow's comedy.
• Poor fit: you only need visitor data, cannot complete a Japanese resident application, need multilingual hands-on support, or would switch only for the sketch or prize chance.
• If the plan itself is wrong, the campaign cannot repair the mismatch. Compare coverage, identity checks, payment, eSIM support, roaming, and cancellation before opening the entry screen.

Pass the linked-account and August 31 checks

The campaign accepts entries from current and future ahamo customers, but the benefit conditions converge on one date: the entrant must have an ahamo contract on 2026-08-31, and the entry d Account must be linked to that ahamo phone number.

• Use the d Account you intend to link to the ahamo line. The normal application flow says one d Account can hold only one ahamo line and an account already linked to a line cannot be reused for a second application.
• The campaign is limited to people living in Japan with contact details in Japan. It is not a short-stay visitor eSIM offer.
• Keep the email address registered to the d Account current because viewing instructions are sent there. Keep the Japanese postal address current because physical prizes are not resent when returned as undeliverable.
• Other campaigns in the same month may not be eligible for duplicate prize receipt. Check the live rules before relying on several benefits together.

Prepare the resident application without losing the deadline

New foreign-resident applicants should solve identity, address, payment, and device checks before treating the campaign deadline as a reason to rush. Official ahamo guidance lists a residence card for foreign applicants and requires the application name and address to match the identity document.

• Prepare a valid residence card or the correct current identity-document route, plus a matching Japanese address. Review the current second-generation-card restriction if your card was issued from June 14, 2026.
• Prepare a supported credit card or bank account in the contract holder's name, a non-carrier email address for the d Account, and a compatible unlocked device.
• eSIM can avoid shipping and may start sooner, but it still needs approval, setup, and a working internet connection. A campaign deadline does not guarantee activation by that date.
• Keep an existing voice/SMS line until the new ahamo number, carrier SMS, d Account link, and important 2FA services all work.

Use the safest order

First decide whether ahamo solves your monthly phone-number and data needs. Next prepare the resident application and d Account. Only after the line and account path fit should you support, enter, and verify your August 31 status.

• Compare the plan on the plans page, then review the new residence-card guide and FAQ.
• If points or referral value matter more than comedy access, compare the separate ahamo referral campaign; do not assume campaign benefits stack.
• This site includes referral links. Use the referral page only after plan fit and official eligibility are clear, and recheck the Rainbow campaign page before July 31 and again before August 31.