Security could be a concern too—maybe a verification feature for counterfeit photobooks. A unique code inside that checks authenticity online. Or a loyalty program where owning the photobook gives you points or access to events. Maybe integrating with social media so fans can share their favorite photos with a hashtag, linking back to Nozomi's page.
Another thought: interactive elements in the physical book. Like pages that, when scanned, show a video of the photo being taken. Or a behind-the-scenes look at the photoshoot mentioned in the link. Maybe a timeline of her photo career, with the photobook as the centerpiece. Also, limited edition features that come with the link, like early access to merchandise. photobook nozomi kurahashi 26 link
Wait, the user mentioned "useful feature," so it should add real value. Maybe a language translation feature on the website, since some fans are non-Japanese. Subtitles for videos, or translated stories. Also, a way to submit fan mail that could be selected for future content. Or a digital scrapbook where fans can create their own pages using the photobook's content. Security could be a concern too—maybe a verification
The user probably wants a feature that enhances the photobook experience. Let me brainstorm. Maybe an augmented reality (AR) feature where scanning the photobook with a smartphone brings up videos or 3D models of Nozomi? That could make it more interactive. Another idea is a personalized message or QR code that links to her social media or a fan page. Or maybe integrating a map to show locations featured in the photobook. Maybe integrating with social media so fans can
Also, integrating with her official website or social media would help drive traffic and keep fans engaged. Maybe a subscription service for updates or a digital archive. But the user specified "useful"—so maybe focusing on accessibility, like a digital version for people who can't get the physical book, or a way to share photos from the photobook digitally while respecting copyright.
I should also consider the target audience. Fans often appreciate exclusive content, so linking to interviews, making-of videos, or acoustic versions of songs. Personalization features where users can input their name to get a custom message from her. Maybe a calendar with dates from the photobook, and reminders for events or her birthdays.