Advertise in Diamond Online: What Brands Need to Know
Advertise in Diamond Online to reach Japanese managers, executives and business professionals through one of the country's best-known business news websites. Its readers follow companies, management and the economy, so your message sits in a setting built for professional decisions.
For global advertisers, Diamond Online is a direct route into Japan's corporate and investor community at scale. Tie-up articles, executive interviews, email and display give brands in finance, property, technology and professional services several ways to reach the same audience, with creative adapted into Japanese.
This guide covers what the placement delivers, where your brand can appear and how our expert team at Masscom Global books it for you.
Why Diamond Online Works for Investors and High-Net-Worth Readers
Media Intelligence: Reaching Investors and High-Net-Worth Readers in Japan
Why Diamond Online Matters in Japan
Diamond Online (DIAMOND online) is a Japanese business news website that averaged 23.42 million monthly users and 111.39 million monthly page views in Oct to Dec 2025, with about 1.42 million registered members (Diamond media guide and official ad site, as reported July 2026).
Its audience skews toward large employers and senior roles: about 38% of users work at companies with 1,000 or more employees, and about 30% are department managers or higher (same source). The site sits alongside the weekly business magazine Diamond WEEKLY, which can be linked to magazine reprint tie-ups.
What the Published Data Says About the Audience
- Monthly users. 23.42 million on average (Oct to Dec 2025, Diamond media guide).
- Monthly page views. 111.39 million on average (Oct to Dec 2025, Diamond media guide).
- Large-company readers. About 38% of users work at companies with 1,000 or more employees (Diamond media guide, 2026).
- Senior roles. About 30% of users are department managers or higher (Diamond media guide, 2026).
- Registered members. About 1.42 million members, who can be targeted by attributes such as age, income and job type (official ad site, 2026).
A Media Planner's View: Where to Place
Use Diamond Online when you need both reach and seniority among Japanese business readers. Tie-up articles and executive interviews carry the brand story, while email and display extend it to a wider audience and to registered members who can be targeted by attribute.
For lead generation, gated article continuations and document downloads work well with B2B, finance and property offers. We plan flights around Japan's corporate calendar and combine the site with airport and premium out-of-home media when a campaign also needs to reach travelling executives.
Masscom Expert Recommendation: Why Advertise Here
Diamond Online is the digital arm of a long-established Japanese business publisher, and it combines very large reach with a senior professional readership. For investors and premium brands entering Japan, it offers scale and seniority in the same buy, which is rare in a market where business media is often fragmented.
How we would use it. We would combine a tie-up article or executive interview with exclusive or targeted email and display, and add lead-generation formats where the goal is enquiries. Creative and tie-up copy are produced in Japanese, with timing set around corporate and fiscal calendars.
Our guidance. Because the audience is large and varied, we use member targeting and tie-up formats to focus delivery on the managers and investors you want, rather than relying on broad display alone.
How We Would Run Your Diamond Online Campaign
We start with the audience you need to reach, whether that is investors, business owners or high-net-worth families, and work back to the title, section and edition that put you in front of them. The schedule follows from that.
The rest is ours to handle: creative adapted for Japanese, the insertion booked and proofed, and reporting once the advertisement has run.
Where Can Your Brand Appear in Diamond Online?
- Tie-up articles. Produced articles in standard, serial and executive-interview formats.
- Lead generation. Gated article continuations and document-based offers.
- Email. Exclusive single-advertiser, attribute-targeted, broadcast and newsletter placements.
- Display. Billboards, rectangles, smartphone in-article units and in-read video.
- Webinars and events. Sponsored webinars and event planning.
Available formats, positions and lead times vary by edition, so our expert team at Masscom Global confirms them with the publisher for your dates.
Why Advertise in Diamond Online?
Diamond Online offers Japan's business readers at scale, with a visible senior and large-company audience and a full set of tie-up, email and display formats. It suits finance, property, technology and premium brands entering or growing in Japan.
Key Reasons Advertisers Choose It
- Scale with seniority. 23.42 million average monthly users, with about 30% at department manager level or above (Diamond media guide).
- Credible editorial formats. Tie-ups and executive interviews build trust with business readers.
- Targeted delivery. Member and email targeting focus spend on the right professionals.
Book Diamond Online Through Masscom Global
Our expert team at Masscom Global plans and books premium press and digital placements for brands targeting business and high-net-worth audiences in over 140 countries. Tell us your objective, budget and dates and we will confirm current rates and positions for Diamond Online.
✅ Placement guidance across print and digital
✅ Creative and localisation support
✅ Coordination with airport, OOH and digital media
✅ Reporting once your placement is live
Frequently Asked Questions
How do I advertise in Diamond Online?
Our expert team at Masscom Global plans and books Diamond Online campaigns, from tie-up articles to email and display. Share your objective, budget and dates, and we will handle formats and timing.
Does Diamond Online reach high-net-worth individuals and investors?
It reaches a large base of Japanese managers, executives and business professionals, with a strong share at large companies, which includes many wealthy individuals and investors. Our expert team at Masscom Global uses targeting and premium tie-up formats to focus on them.
Where should I advertise to reach investors in Japan?
Diamond Online is a strong digital route to Japanese business and investor readers, and we add financial press and airport media for wider wealth coverage. Our expert team at Masscom builds the mix from one brief.
Which Diamond Online format works best for business advertisers?
Tie-up articles and executive interviews build credibility, while email and lead-generation formats drive enquiries. We usually combine them in one plan.
How much does Diamond Online advertising cost?
Rates depend on format, section, position and timing. Our expert team at Masscom Global confirms current rates against your brief.
Do you handle Japanese creative for Diamond Online?
Yes. Our expert team at Masscom Global coordinates Japanese localisation, including tie-up copy, so your message suits Japanese readers and can run alongside airport media.
