We interviewed Mr. Masahiro Hosoya, President of GREGE Holdings, about the background behind introducing Repsona and his impressions of using it.

What kind of business do you use Repsona for?

Mr. Hosoya:
GREGE Holdings currently owns and manages six operating companies. These include a system development company, a consulting firm, a staffing agency, a logistics company, a space development business, and a restaurant operation.
Despite the differences in industry, the essence of project management and team collaboration is the same across all of them.

We use Repsona as a core communication tool and as a key element of project and team management.

What challenges did you face before implementing Repsona?

Mr. Hosoya:
When I started my business, I never imagined I would one day be managing six companies. Over time, we have created new services, acquired and sold operating companies, and made various investments—growing to our current scale.
However, our approach to management has never changed. We have always valued efficiency and maintained the principle of “always being able to see and understand the whole picture.”

“Being able to see” means always having immediate access to necessary information and project status.
We’ve been strongly committed to going paperless. Our operations are centered around Google Workspace, where everything is connected through the cloud.
Our philosophy is that if something can’t be done within Google Workspace, automated, or shared, then it’s not work we should be doing. While this approach may not be the cheapest, it’s the best defense against shifts in the business environment.

Of course, the more we monitor, the more we might feel tempted to demand daily reports. But once you start requiring detailed written updates on everything, people spend time writing polished reports, you need more managers to review them, and although it might look efficient because IT is involved, it loses the true essence of management.

In Repsona, all you really need to know is whether a task is DONE or not—and how to move it forward next.
What matters is the context: what’s been done, who’s responsible now, and by when.
It’s like this—if multiple people write long reports, a single 10-minute Zoom meeting can accomplish what would otherwise take an hour to write.

The question is whether the flow of issue resolution keeps moving or stalls.
I wanted a tool that could elegantly connect the work we do in Google Workspace and keep that flow continuous.
Repsona’s Gantt Chart view serves as a visual alternative to daily reports for the entire team.

Simple, easy-to-read, and share-friendly Gantt charts.

Why did you choose Repsona?

Mr. Hosoya:
When a Gantt chart serves as a daily report for the whole team, I naturally want to record as much detail as possible.
A detailed Gantt chart can be efficient—but if it becomes too complex, continuity suffers.

In one project I joined, the client used a very detailed Gantt chart. But because it was complicated, some team members stopped updating it or entered incomplete information.
As a result, the Gantt chart stopped reflecting reality, updates slowed down, and the team eventually had to introduce a separate reporting system. In the end, they stopped using the Gantt chart altogether.

That experience made me feel Gantt charts were cumbersome—until I was invited to a team using Repsona.
When I tried it, I found it to be simple, lightweight, and visually easy to follow, with a clean aesthetic that appeals to Japanese sensibilities.

It’s surprising that Repsona isn’t more widely known—it’s by far the easiest Gantt-based tool I’ve used.
I’m not sure about the technical details, but nearly all functions are available indefinitely on the free plan, not just for a 30-day trial. That’s a major advantage—you can try it as long as you like and truly see how it works.

What are your expectations for Repsona in the future?

Mr. Hosoya:
I feel that the current display and functionality are sufficient.
In fact, adding too many features might compromise the simplicity, so I think the current level—intuitive and non-intimidating for team members—is just right.

What I’d most like to see next is API integration, especially with Google Workspace.
If an API becomes available, we’d like to use Google Apps Script to customize and automate our workflows freely.