SoftBank scales innovation and accelerates growth with open collaboration

“Slack drives SoftBank’s growth by eliminating barriers between departments, opening up companywide communication, and empowering everyone to share new ideas.”

Ken MiyauchiRepresentative Director and President, SoftBank

Since its founding in 1984, SoftBank has been at the forefront of telecommunications in Japan. From the country’s first emails sent on mobile phones to the introduction of the iPhone in the Japanese market, the group has sped ahead of competitors both domestically and abroad. In keeping with its commitment to innovation, SoftBank unveiled its Beyond Carrier strategy, an ambitious plan to provide services across a range of industries, including AI, big data, health care and more.

But traditional forms of communication were slowing the conglomerate down and standing in the way of its vision. SoftBank, which comprises more than 260 companies and 40,000 employees, needed a scalable solution that would allow the 17,000 employees supporting its core company to quickly make decisions and execute new strategies. Encouraged by the success of early internal adopters of Slack, SoftBank formally adopted the platform in October 2020. The switch to secure channel-based messaging not only transformed communications; it enabled the company to scale knowledge, automate workstreams and accelerate decision-making.


“The companywide introduction of Slack has both transformed our internal communication at SoftBank and had a positive effect on our customers and stakeholders.”

Kunihiro FujinagaSenior Vice President, Business Strategy and Marketing, Corporate Business Unit, SoftBank Corp
Matt Brewer
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Matt Brewer10:55 AM

Hi, everyone! I have a meeting with a major online communication client tomorrow. Their virtual meeting platform is essential for workplace agility and remote working. Please feel free to share your ideas to develop our market opportunity with them.

Jagdeep Das11:00 AM

I'm no longer able to use the whiteboard feature, which was really useful during virtual brainstorm sessions. Can we ask them to consider bringing this back?

Sara Parras11:05 AM

As part of their new beta features, users can set specific presentation slides as a virtual background to make it look like a real face-to-face presentation. Can they extend the same feature to more slide software options? It'll be handy for companies that use different systems.


Ditching meetings and emails for fast, open communication

Like many legacy companies, SoftBank had long relied on email and in-person meetings to facilitate business. But that approach grew cumbersome and time-consuming as the company expanded. When leaders needed to make fast decisions, they would gather relevant stakeholders in a meeting. “The problem with this strategy is the more you want to speed up business, the more meetings you need,” says Keiichi Makizono, a senior vice president, the chief information officer, and the head of SoftBank’s IT and network unit. “In our corporate culture, we decide and execute things quickly, which led to a considerable number of meetings each day.”

This resulted in stacked schedules and left little time for deep thinking and strategizing. “Many executive officers couldn’t physically get out of the meeting room because they had continuous face-to-face meetings,” says Kunihiro Fujinaga, the senior vice president of business strategy and marketing for SoftBank’s corporate business unit. The company’s reliance on word-of-mouth communication led to other issues too, he says. “Communication was always a problem: The fast pace of business and parallel progression of multiple projects resulted in repetitive work.”

The company initially encouraged every department to choose its own collaboration tools. While that policy gave people flexibility, it also created a fragmented communications experience, with information scattered over multiple platforms and email. Slack had emerged as one of the most popular tools among the younger generation of workers. The platform’s ease of use and interoperability with other workplace tools caught Makizono’s attention.

“From the perspective of managing IT operations, the ideal situation is to have just one companywide collaboration tool,” he says. “You also need to be able to link the tool with the company’s IT systems so you can conduct all of your daily operations and communications there. For this, Slack was the obvious choice.”


“The early Slack adopters at SoftBank knew its potential. To maintain that momentum and break our dependence on emails and face-to-face meetings, we introduced Slack companywide to speed up decision-making and accelerate business growth.”

Keiichi MakizonoSenior Vice President, Chief Information Officer, IT and Network Unit, SoftBank Corp

Scaling knowledge and introducing operational efficiencies

Kazushi Iizuka, who works in SoftBank’s AI/RPA promotion office in the consumer sales unit, was one of the company’s earliest Slack users. His experience inspired him to push for its adoption companywide. “I knew Slack was a tool that could deliver efficient communication,” he says.

Matt Brewer
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Harry Boone10:55 AM

Check out these on-site visits in Hokkaido. The stores were full of customers this morning. We're partnering with the local team to sell all the units in store, across retail partners and wherever possible!

Lisa Dawson11:00 AM

From Store A:
The last handset was just sold to a customer who joined us from another network! All the handsets for this store are sold out. We're aiming to see similar success across the other stores.

Matt Brewer11:05 AM

This is great news! It’s a real game changer to have this Slack channel where we can easily see what’s happening on the ground. Big kudos to all the teams and individuals who made these record sales a reality!


When Iizuka and his teammates used email, it was challenging to loop in others, especially if they weren’t on the original message. Long threads made information hard to locate and pass along. When his team switched to Slack, they were able to share conversations with all of the relevant stakeholders instantly. “Employees in different workplaces realized we could solve our communications problem in one fell swoop with Slack, leading to a rapid expansion of users,” he says.

Iizuka says the benefits of Slack continue to underscore its value at SoftBank. “It’s not just that Slack is easy to use; the speed of product updates and feature developments keeps pace with our requirements,” he says. “We were keenly aware of the need to increase our own operational efficiency, which drove Slack’s popularity.” Slack also helps SoftBank’s teams optimize the processes and apps they already use. “Slack’s ability to link with various apps and APIs make the platform very compatible with our workflows.”


“The ability to aggregate information and search in Slack is part of why it became so popular. When teams noticed how intuitive and easy it was to share knowledge, it led to rapid expansion.”

Kazushi Iizuka AI/RPA Promotion Office, Consumer Sales Unit, SoftBank Corp

Accelerating business with external partners in Slack Connect

Slack has transformed collaboration at SoftBank for 20,000 employees and counting. Teams have been quick to link internal systems with Slack, automating as many business processes as possible to free up time for deeper work. For example, in the sales division, SoftBank replaced email notifications containing the latest metrics and results with automated updates in Slack. The change cut out unnecessary notifications while giving all stakeholders easy access to the most recent sales numbers.

In the future, SoftBank aims to extend channel-based messaging to its partner companies with Slack Connect, a secure environment for collaborating with outside organizations. “We plan to leverage Slack to encourage more open collaboration both internally and externally,” Fujinaga says. “With Slack, we can foster a culture of open, channel-based communication that moves work forward faster.”