ACSiON and Rakuten Card Introduce Warning Function to Prevent Phishing Scam Damage
ACSiON and Rakuten Card will introduce a warning function to prevent damage from phishing scams starting today, May 1, 2026. This function will display a warning screen to customers suspected of entering personal information on phishing sites, thereby preventing fraudulent use.
📋 Article Processing Timeline
- 📰 Published: May 2, 2026 at 00:00
- 🔍 Collected: May 1, 2026 at 15:32
- 🤖 AI Analyzed: May 1, 2026 at 15:41 (9 min after Collected)
ACSiON Co., Ltd.
Rakuten Card Co., Ltd.
ACSiON Co., Ltd. (hereinafter "ACSiON") and Rakuten Card Co., Ltd. (hereinafter "Rakuten Card") will introduce a warning function to prevent damage from phishing scams starting today, May 1, 2026 (Friday). A warning screen will be displayed to customers suspected of entering their Rakuten ID, password, credit card number, etc., on a phishing scam site, thereby preventing damage.
Image of warning screen display
In recent years, damage from unauthorized use of credit cards has been expanding, with the amount of damage from unauthorized credit card use in 2025 reaching 51.05 billion yen, exceeding 50 billion yen for the third consecutive year (Note 1). Approximately 93.1% of the damage is due to card number theft, and among these, damage from phishing is expanding. Phishing is a method of defrauding personal information and credit card numbers through fake websites and emails, and its techniques are becoming more sophisticated year by year. The number of phishing reports in 2025 was approximately 2.45 million, an increase of about 740,000 from the previous year (Note 2).
Against this background, ACSiON and Rakuten Card are introducing this function with the aim of protecting Rakuten Card customers from unauthorized use damage and preventing it, by utilizing the knowledge and technology cultivated so far. A warning screen will be displayed to customers suspected of entering their Rakuten ID, password, credit card number, etc., on a phishing scam site.
Since January 2025, ACSiON and Rakuten Card have been working to suppress phishing damage by utilizing ACSiON's know-how to detect phishing sites impersonating Rakuten Card, close the sites, and collaborate with browser providers to activate safe browsing functions during the period until the site is closed. ACSiON and Rakuten Card will continue to work to reduce phishing damage so that customers can use their credit cards with peace of mind.
(Note 1) Based on published figures by the Japan Credit Association.
(Note 2) Based on published figures by the Council of Anti-Phishing Japan.
[About ACSiON Co., Ltd.]
ACSiON Co., Ltd. is a cybersecurity company established in July 2019, centered around members who have been involved in financial crime countermeasures at banks. Utilizing their know-how in financial crime countermeasures and solution building capabilities, they provide services that respond to new risks in the digital society.
For more details, please visit https://www.acsion.co.jp/.
[About Rakuten Card Co., Ltd.]
Rakuten Card Co., Ltd. has been issuing "Rakuten Card" since July 2005. We aim to support a comfortable and rich daily life through safe and easy-to-use financial services by expanding credit card services and functions. The annual shopping transaction volume for fiscal year 2025 reached 26.5 trillion yen, and the number of cards issued exceeded 33.41 million (as of December 2025).
For more details, please visit https://www.rakuten-card.co.jp/.
*The information published here is current as of the announcement date. Please note that the latest information may differ.
[ACSiON Co., Ltd. (URL: https://www.acsion.co.jp/)]
Company Name: ACSiON Co., Ltd.
Location: Harumi 1-8-10, Chuo-ku, Tokyo
Representatives: Representative Directors Takaki Yasuda / Takaaki Takishita
Business Activities: Cybersecurity business, Data intelligence business
Date of Establishment: July 16, 2019
End
Rakuten Card Co., Ltd.
ACSiON Co., Ltd. (hereinafter "ACSiON") and Rakuten Card Co., Ltd. (hereinafter "Rakuten Card") will introduce a warning function to prevent damage from phishing scams starting today, May 1, 2026 (Friday). A warning screen will be displayed to customers suspected of entering their Rakuten ID, password, credit card number, etc., on a phishing scam site, thereby preventing damage.
Image of warning screen display
In recent years, damage from unauthorized use of credit cards has been expanding, with the amount of damage from unauthorized credit card use in 2025 reaching 51.05 billion yen, exceeding 50 billion yen for the third consecutive year (Note 1). Approximately 93.1% of the damage is due to card number theft, and among these, damage from phishing is expanding. Phishing is a method of defrauding personal information and credit card numbers through fake websites and emails, and its techniques are becoming more sophisticated year by year. The number of phishing reports in 2025 was approximately 2.45 million, an increase of about 740,000 from the previous year (Note 2).
Against this background, ACSiON and Rakuten Card are introducing this function with the aim of protecting Rakuten Card customers from unauthorized use damage and preventing it, by utilizing the knowledge and technology cultivated so far. A warning screen will be displayed to customers suspected of entering their Rakuten ID, password, credit card number, etc., on a phishing scam site.
Since January 2025, ACSiON and Rakuten Card have been working to suppress phishing damage by utilizing ACSiON's know-how to detect phishing sites impersonating Rakuten Card, close the sites, and collaborate with browser providers to activate safe browsing functions during the period until the site is closed. ACSiON and Rakuten Card will continue to work to reduce phishing damage so that customers can use their credit cards with peace of mind.
(Note 1) Based on published figures by the Japan Credit Association.
(Note 2) Based on published figures by the Council of Anti-Phishing Japan.
[About ACSiON Co., Ltd.]
ACSiON Co., Ltd. is a cybersecurity company established in July 2019, centered around members who have been involved in financial crime countermeasures at banks. Utilizing their know-how in financial crime countermeasures and solution building capabilities, they provide services that respond to new risks in the digital society.
For more details, please visit https://www.acsion.co.jp/.
[About Rakuten Card Co., Ltd.]
Rakuten Card Co., Ltd. has been issuing "Rakuten Card" since July 2005. We aim to support a comfortable and rich daily life through safe and easy-to-use financial services by expanding credit card services and functions. The annual shopping transaction volume for fiscal year 2025 reached 26.5 trillion yen, and the number of cards issued exceeded 33.41 million (as of December 2025).
For more details, please visit https://www.rakuten-card.co.jp/.
*The information published here is current as of the announcement date. Please note that the latest information may differ.
[ACSiON Co., Ltd. (URL: https://www.acsion.co.jp/)]
Company Name: ACSiON Co., Ltd.
Location: Harumi 1-8-10, Chuo-ku, Tokyo
Representatives: Representative Directors Takaki Yasuda / Takaaki Takishita
Business Activities: Cybersecurity business, Data intelligence business
Date of Establishment: July 16, 2019
End