docusign-androidDocuSign, the e-signature software company with operations in Seattle and San Francisco, announced today that three Japanese firms – NTT Finance, Mitsui & Co. and Recruit Holdings – all made strategic investments in it as a part of a $115 million series E financing round.

The three companies will each begin using DocuSign’s software to power their businesses, and Mitsui will also market DocuSign’s technology to its affiliate businesses and customers. In addition to the infusion of cash, the deal also will help DocuSign expand internationally.

“We’re thrilled to have Recruit Holdings, Mitsui, MKI, and NTT join the DocuSign Global Trust Network as strategic investors and partners,” DocuSign CEO Keith Krach said in a statement provided to GeekWire. “Each of them are critically important in helping DocuSign launch into the Japanese market and to bring The Global Standard for Digital Transaction Management to Japan.”

The company is working to expand its reach in Asia, and the three investors announced today are all high-profile customers for DocuSign to use as examples when attracting new customers and growing its business. For a company that’s heading towards an eventual IPO, this global expansion will be a boon.

DocuSign has raised a whopping $230 million to date. Last month, the company announced that it had received an investment from Australian telecommunications giant Telstra, which joined an $85 million round. Earlier backers include Ignition Partners, Kleiner Perkins, Accel and Google Ventures. Led by tech exec Keith Krach, DocuSign also has received backing from Salesforce.com

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