In this article we speak with the YMIRLINK platform team — makers of the Cuenote messaging services used widely across Japan — about why they rethought their virtualization stack, why they moved to Virtuozzo, and how Hitachi Systems helped them do it smoothly and locally. If you’re a business in Japan that wants proven virtualization and HCI on your own infrastructure, in your own country, their journey is a useful map.
Meet the customer
YMIRLINK builds and operates Cuenote, a platform for high-volume email, SMS, and safety-confirmation services. The team is lean, the workloads are demanding, and reliability is non-negotiable.
YMIRLINK: “Cuenote handles a lot of communication that just has to work. Our job is to keep performance steady and operations simple so our engineers can focus on product, not on babysitting servers.”
That mindset shaped every decision that followed.
The turning point: licensing shock and a loss of control
For more than a decade, YMIRLINK ran on their incumbent hypervisor without drama. Then the vendor changed its licensing — from per-socket to per-core, with a 72-core minimum and bundled editions they didn’t need. When YMIRLINK modeled the new plan, projected costs shot up to around eight times their current spend.
YMIRLINK: “It wasn’t just ‘prices went up.’ The whole model changed. Overnight we were looking at a new baseline we hadn’t planned for. That’s when we said: we need to protect our flexibility, or we’ll be chasing someone else’s roadmap forever.”
Rather than rip-and-replace, the team chose a calm, phased migration tied to natural hardware refresh cycles across sites ranging from a few VMs to several dozen.
YMIRLINK: “A big-bang cutover would have created more risk than value. Moving in step with hardware refresh keeps operations predictable and avoids surprises for our users.”
What they looked for (and what they refused to compromise)
YMIRLINK compared candidate platforms, and they were clear about the bar:
- Total cost in the real world: licenses plus people time
- Freedom from lock-in: no repeat of the same trap
- Simplicity: a platform the team can run without heroics
- Storage performance: consistent throughput for messaging
- A future path: containers/Kubernetes when it actually helps
YMIRLINK: “We weren’t chasing the shiniest feature list. We wanted the platform that would make our day-to-day lighter and keep our options open over the long term.”
Why Virtuozzo
YMIRLINK selected Virtuozzo, an OpenStack-based stack using KVM, with compute, software-defined storage, and networking integrated behind a straightforward, modern UI.
YMIRLINK: “The UI sounds like a small thing until you live in it all day. Virtuozzo’s management experience is clean and consistent, which reduces the mental load. That shows up in the bottom line — not just license savings, but fewer hours spent clicking through complexity.”
Performance mattered, too:
YMIRLINK: “Our workloads are throughput-sensitive. Virtuozzo’s storage layer gave us the performance we expected without gymnastics. No sprawling storage setup, no mystery bottlenecks — just the speed we need.”
And the architecture itself helped them sleep at night:
YMIRLINK: “With KVM at the core and open components, we don’t feel boxed in. If requirements change, we have room to move. That’s a big deal for planning beyond the next quarter.”
Critically, Kubernetes is available inside the same platform, so the team can adopt containers when it aligns with product priorities — without introducing another vendor or control plane.
Delivered with Hitachi Systems: local validation, local support
To make the change feel low-risk, YMIRLINK partnered with Hitachi Systems in Japan.
Hitachi Systems: “We implement multiple virtualization stacks, so our starting point is: what fits this environment best? For Virtuozzo we built verification, installation manuals, and runbooks our engineers and customers can rely on.”
Beyond design and builds, Hitachi Systems provided migration assistance and Japan-based support, with options up to 24×7 for mission-critical operations. Virtuozzo’s UI and documentation are Japanese-localized, which shortened onboarding for YMIRLINK’s team.
YMIRLINK: “Having a partner who had already gone hands-on — who could answer ‘this is how we do it here’ — made all the difference. Their tested guides let us standardize each site and move forward without second-guessing every step.”
What changed for YMIRLINK
- Lower, more predictable TCO
License savings are part of the story; the bigger win is less operational drag thanks to an integrated UI and predictable workflows.
- Performance that keeps pace
Virtuozzo’s storage delivered the throughput their messaging services require, without exotic tuning or add-ons.
- Smoother days for engineers
Fewer moving parts, clearer management, and less context-switching add up to time back for product work.
- A rollout without drama
By aligning migrations with hardware refresh, each move felt routine rather than risky.
- A path forward, not a corner
When containers make sense, Kubernetes is already there — no need to bolt on a new stack.
YMIRLINK: “Day to day, it’s simply easier to run. We’ve kept performance where it needs to be, and we’ve reduced the time we spend on the platform itself. That’s exactly what we hoped would happen.”
What’s next
YMIRLINK will continue its step-by-step migration and selectively adopt containers/Kubernetes where it benefits the service and customers.
YMIRLINK: “The platform gives us control today and options for tomorrow. That combination is what we were after from the start.”
Ready to do this in Japan — on your own infrastructure?
If you’re a business in Japan that wants proven virtualization and HCI on infrastructure you control, kept in-country, Virtuozzo and Hitachi Systems can help. We’ll assess your current environment, build a phased plan that fits your cadence, and get you running without the drama.
Want to get started? Get in touch and let’s plan your first step.
