ahamo referral points only help when the invite URL, d account, and SIM-only route line up.

Start with the invited person's line, not the reward

The referral headline is attractive, but the useful decision is whether ahamo solves the invited person's Japan setup. A referral URL will not fix a plan mismatch, identity issue, or device setup problem.

• Good fit: foreign residents, students, workers, and long-stay users who need a Japanese mobile number for calls, carrier SMS, housing, school, work, delivery, banking, or account recovery.
• Weak fit: short-stay visitors who only need maps, translation, hotel apps, messaging, and web. Start with the data-only eSIM guide or before-arrival checklist instead.
• If the invited person is already choosing between this and ahamo's SIM-only MNP reward, compare the 20,000 dPOINT MNP guide before entering.

What the official pages say now

The ahamo referral page checked on 2026-06-23 shows a campaign period beginning 2025-11-28 with no end date displayed on the page. It also states that from 2025-12-22 the referrer benefit cap changed from one invited person to three people per d account.

• The referrer benefit is a total of 7,000 limited-time dPOINTs for each eligible invited user, up to the stated cap.
• The invited user benefit is 13,000 points when switching to ahamo by MNP, or 6,000 points when opening a new phone number.
• The official ahamo campaign list also includes the referral campaign, with no end date in the current campaign feed checked during this run. Recheck on the application day because ahamo says campaign terms may change.

Entry and d account timing decide eligibility

The referral path has two separate roles. The current ahamo user issues the referral URL, and the invited user must enter from that URL with the d account they will use for ahamo. Missing that path can remove the benefit for both sides.

• The invited user must enter by the end of the month in which ahamo opens, using the d account they use for the ahamo application.
• The line must be opened through the ahamo site without buying a device. SIM-only includes eSIM, but a phone purchase with the application is outside this referral route.
• The same d account cannot be used as both the referrer's entry account and the invited user's campaign entry account. Keep accounts and screenshots clear before applying.

Do not stack MNP campaigns blindly

ahamo's overlap guidance is important because several active offers target SIM-only MNP users. The referral campaign may not combine with other ahamo MNP campaigns, and the latest valid entry at the end of the opening month can decide which offer is applied.

• The official overlap page lists the referral campaign, the ahamo dPOINT MNP campaign, and the ahamo return campaign as active campaigns under the overlap rule.
• It also notes that if the SIM-only MNP Amazon gift card campaign is entered and won, the listed campaign benefits are not granted; if not won, the listed campaign terms can apply.
• Treat the higher-looking reward as conditional. Pick one campaign path deliberately instead of entering every offer you see.

Plan, document, and setup checks come first

A referral campaign only matters after ahamo itself fits. The official plan page checked during this run lists 30GB at 2,970 yen, the 110GB large option at 4,950 yen, and 5-minute domestic calls included with exceptions. That is the plan you are choosing before points.

• ahamo's application flow asks users to prepare a d account, payment by credit card or bank transfer, and identity documents. The flow lists residence card for foreign nationals and says the name/address on documents must match the application.
• If the invited person keeps their current phone, they should check SIM lock, ahamo support, eSIM support, Wi-Fi for setup, and the old line until the transfer works.
• Use the plan comparison, FAQ, and referral page after the official campaign conditions still match the contract route.