Exhibit 99.3

Dear Valued Customer,

We are pleased to share with you today that TDK has announced the acquisition of InvenSense. Pending regulatory and InvenSense shareholder approval, we believe this acquisition will enable us to better serve your needs with a more comprehensive sensor platform with broader core competencies.

This acquisition brings together our sensor solution capabilities spanning the mobile, IoT, automotive and industrial markets with a broad portfolio of motion, location, pressure, ultrasonic and audio/microphone sensor technologies under the TDK Sensors Business Group. Together, we believe our combined technologies and global reach will accelerate and enhance our roadmap for future sensor product solutions and make us the best possible sensor technology partner for you and your organization.

TDK has a strong commitment to customer satisfaction and extending that same commitment to the acquisition of InvenSense is one of the many reasons why this combination makes sense. We appreciate your business and remain as committed as ever to provide the highest level of quality, service and support that you have come to expect from InvenSense. Until the transaction closes, which is expected in the third calendar quarter of 2017, InvenSense will continue to operate as an independent company with no changes to your sales and support contacts or the strong relationship we have built with you.

We look forward to enriching our support and solutions to help you to achieve your business and technology objectives.

Sincerely,

1745 Technology Drive, Ste. 200  •  San Jose, California 95110  •  Tel 408.988.7339  •  Fax 408.988.8104

www.invensense.com

Additional Information and Where to Find It

In connection with the proposed transaction, TDK and InvenSense intend to file relevant materials with the United States Securities and Exchange Commission (the “SEC”). InvenSense will also file with the SEC a proxy statement on Schedule 14A. Following the filing of the definitive proxy statement with the SEC, InvenSense will mail the definitive proxy statement and a proxy card to each stockholder entitled to vote at the InvenSense special meeting relating to the proposed transaction. INVESTORS AND SECURITY HOLDERS OF INVENSENSE ARE URGED TO CAREFULLY READ THESE MATERIALS IN THEIR ENTIRETY (INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) AND ANY OTHER RELEVANT DOCUMENTS THAT TDK OR INVENSENSE FILE WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT TDK, INVENSENSE AND THE PROPOSED TRANSACTION. The proxy statement and other documents filed by InvenSense with the SEC may be obtained free of charge at InvenSense’s website at www.invensense.com or at the SEC’s website at www.sec.gov. These documents may also be obtained free of charge from InvenSense by requesting them by mail at InvenSense, Inc., 1745 Technology Drive Suite 200, San Jose, California 95110, Attention: Investor Relations, or by telephone at (408) 501-2200. The documents filed by TDK with the SEC may be obtained free of charge at the SEC’s website at www.sec.gov. These documents may also be obtained free of charge from TDK by requesting them by mail at Shibaura Renasite Tower, 3-9-1 Shibaura, Minato-ku, Tokyo 108-0023, Japan, Attention: Investor Relations.

This communication does not constitute a solicitation of proxy, an offer to purchase or a solicitation of an offer to sell any securities. TDK, InvenSense, and certain of their directors, officers and employees may be deemed to be participants in the solicitation of proxies from the stockholders of InvenSense in connection with the proposed transaction. Information about the persons who may, under the rules of the SEC, be considered to be participants in the solicitation of InvenSense’s stockholders in connection with the proposed transaction, and any direct or indirect interests, by security holdings or otherwise, they have in the proposed transaction, will be set forth in InvenSense’s definitive proxy statement when it is filed with the SEC. Information regarding InvenSense’s directors and executive officers and their ownership of InvenSense’s securities is set forth in the definitive proxy statement for InvenSense’s 2016 Annual Meeting of Stockholders, which was filed with the SEC on July 29, 2016, and its Annual Report on Form 10-K for the fiscal year ended April 3, 2016, which was filed with the SEC on May 25, 2016. These documents may be obtained free of charge at the SEC’s website at www.sec.gov.

Cautionary Statement Regarding Forward-Looking Statements

This communication contains forward-looking statements that address a variety of subjects including, for example, the expected timetable for closing of the transaction between TDK and InvenSense, the expected benefits and synergies of the transaction, TDK’s and InvenSense’s plans, objectives and expectations and TDK’s expected product offerings, product development, marketing position and technical advances resulting from the transaction. Statements that are not historical facts, including statements about beliefs, plans and expectations, are forward-looking statements. Such statements are based on current expectations and are subject to a number of factors and uncertainties, are not historical facts and are subject to risks and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. These forward-looking statements include statements that reflect the current expectations, estimates, beliefs, assumptions, and projections of TDK’s senior management about future events with respect to InvenSense’s business and its industry in general. Statements that include words such as “anticipates,” “expects,” “intends,” “plans,” “predicts,” “believes,” “seeks,” “estimates,” “may,” “will,” “should,” “would,” “potential,” “continue,” “goals,” “targets” and variations of these words (or negatives of these words) or similar expressions of a future or forward-looking nature identify forward-looking statements. In addition, any statements that refer to projections or other characterizations of future events or circumstances, including any underlying assumptions, are forward-looking statements. Actual results could differ materially from those projected or forecast in the forward-looking statements. The following important factors and uncertainties, among others, that could cause actual results to differ materially from those described in these forward looking statements include, without limitation: the parties’ ability to satisfy the conditions precedent to the consummation of the proposed transaction, including, without limitation, the receipt of stockholder and regulatory approvals, including the potential for regulatory authorities to require divestitures in connection with the proposed transaction; the occurrence of any event that could give rise to the termination of the merger agreement; unanticipated difficulties or expenditures relating to the proposed transaction; legal proceedings that may be instituted against TDK or InvenSense and others following announcement of the proposed transaction; disruptions of current plans and operations caused by the announcement or pendency of the proposed transaction; the risk that expected benefits, synergies and growth prospects of the transaction may not be achieved in a timely manner, or at all; the risk that InvenSense’s business may not be successfully integrated with TDK’s following the closing; potential difficulties in employee retention as a result of the announcement and pendency of the proposed transaction; and the response of customers, distributors, suppliers and competitors to the announcement of the proposed transaction. For additional information about factors that could cause actual results to differ materially from those described in the forward-looking statements, please refer to the proxy statement when it becomes available and InvenSense’s filings with the SEC, including the risk factors contained in InvenSense’s most recent Annual Report on Form 10-K. Forward-looking statements represent management’s current expectations and are inherently uncertain. TDK and InvenSense assume no obligation to update the information in this communication, except as required by law. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof.

1745 Technology Drive, Ste. 200  •  San Jose, California 95110  •  Tel 408.988.7339  •  Fax 408.988.8104

www.invensense.com