Share Exchange Agreement



 Exhibit 4.1 

(Translation) 
 Share Exchange Agreement 
 Nidec Corporation (“Nidec”) and Nidec Sankyo
Corporation (“Nidec Sankyo”) hereby enter into this Share Exchange Agreement (this “Agreement”). 
 Article 1: Share
Exchange 
 Nidec and Nidec Sankyo shall execute a share exchange (the “Share Exchange”) with Nidec becoming the wholly-owning
parent company of Nidec Sankyo and Nidec Sankyo becoming the wholly-owned subsidiary of Nidec in accordance with this Agreement, and Nidec will acquire all outstanding shares of Nidec Sankyo pursuant to the Share Exchange. 

Article 2: Trade Names and Addresses of Nidec and Nidec Sankyo 
 The trade names and addresses of Nidec and Nidec Sankyo are as set forth below. 
  

	(1)	Nidec 

  

	 	1.	Trade name: Nidec Corporation 


	 	2.	Address: 338 Tonoshiro-cho, Kuze, Minami-ku, Kyoto 

  

	(2)	Nidec Sankyo 

  

	 	1.	Trade name: Nidec Sankyo Corporation 


	 	2.	Address: 5329 Shimosuwa-machi, Suwa-gun, Nagano 


Article 3: Effective Date 
 The effective
date of the Share Exchange shall be October 1, 2012; provided, however, that the effective date may be modified following consultations by Nidec and Nidec Sankyo if necessary based on the progress of the Share Exchange procedures in accordance
with Article 790 of the Companies Act. In this case, Nidec Sankyo shall give public notice of the modified effective date by the day before the pre-modification effective date (if the modified effective date is before the pre-modification effective
date, then the modified effective date). 
 Article 4: Matters relating to the Number of Shares Granted and Allocation of Shares Pursuant to
the Share Exchange 
  

	1.	When executing the Share Exchange, in exchange for Nidec Sankyo common stock, Nidec shall grant Nidec common stock equal to the number of Nidec Sankyo common shares
owned times 0.068 (fractions less than one share shall be rounded down) to Nidec Sankyo shareholders of record (excluding Nidec; referred to as “Shareholders at the Reference Time”) immediately prior to the acquisition of all Nidec Sankyo
issued shares by Nidec pursuant to the Share Exchange (the “Reference Time”). 

  

	2.	When executing the Share Exchange, Nidec shall allocate to Shareholders at the Reference Time 0.068 shares of Nidec common stock for each one share of Nidec Sankyo
common stock owned. 

  

	3.	When executing the Share Exchange, if any fractional shares of less than one share of Nidec common stock are allocated to Shareholders at the Reference Time, they shall
be handled in accordance with Article 234 of the Companies Act. 








 Article 5: Matters relating to Capital and Reserves 

The amounts of Nidec’s capital and reserves to be increased in conjunction with the Share Exchange are set forth below. 

 

			
	 (1)    Capital:
	 	Zero (0) yen
	 (2)    Capital reserves:
	 	Amount of change in shareholder’s equity specified in Article 39 of the Corporate Accounting Rules
	 (3)    Retained earnings reserve:
	 	Zero (0) yen

 Article 6: Approval Procedures 
  

	1.	Pursuant to Article 796, Paragraph 3 of the Companies Act, Nidec shall execute the Share Exchange without obtaining approval of this Agreement by resolution of its
general shareholders meeting; provided, however, that if approval of Nidec’s general shareholders meeting is required pursuant to Article 796, Paragraph 4 of the Companies Act, Nidec shall seek approval of this Agreement and the adoption of
resolutions concerning necessary matters from its general shareholders meeting by the day before the effective date. 

  

	2.	Nidec Sankyo shall seek approval of this Agreement and the adoption of resolutions concerning matters necessary for the Share Exchange at its ordinary general
shareholders meeting scheduled for June 18, 2012; provided, however, that this may be modified following consultations between Nidec and Nidec Sankyo if necessary according to the progress of the Share Exchange procedures.


 Article 7: Handling of Treasury Shares 
 Nidec Sankyo shall cancel all treasury shares (including any treasury shares acquired from dissenting shareholders exercising their purchase demand rights in connection with the Share Exchange pursuant to
Article 785, Paragraph 1 of the Companies Act) that it holds as of the Reference Time effective as of the Reference Time by resolution of the Nidec Sankyo board of directors adopted at a meeting to be held by the day before the effective date.

 Article 8: Management of Corporate Assets 
 Nidec and Nidec Sankyo shall conduct operations and manage and administer their assets with the due care of a good manager from the day of execution of this Agreement until the day before the effective
date of the Share Exchange, and any conduct that will have a material impact on those assets and rights and duties shall be performed following discussions by and agreement between Nidec and Nidec Sankyo. 

Article 9: Modification of the Share Exchange Conditions and Cancellation of this Agreement 

If during the period from the date of execution of this Agreement until the day before the effective date of the Share Exchange any material changes to
the assets or management status of Nidec or Nidec Sankyo occur, any circumstances that would materially impede execution of the Share Exchange occur, or it otherwise becomes difficult to achieve the objectives of this Agreement, following
discussions by Nidec and Nidec Sankyo, the share exchange conditions may be modified or this Agreement may be canceled. 







 Article 10: Effectiveness of this Agreement 
 If any lawful institutional decisions of Nidec or Nidec Sankyo specified in Article 6 or permits, licenses, registrations, approvals, and the like from the competent authorities necessary for the
execution of the Share Exchange cannot be obtained, this Agreement shall cease to be effective. 
 Article 11: Consultation Matters

 Further to the provisions of this Agreement, Nidec and Nidec Sankyo shall engage in consultations and make a determination in accordance
with the intent of this Agreement concerning any necessary matters relating to the Share Exchange. 
 IN WITNESS WHEREOF, this Agreement shall
be prepared in duplicate, and following execution by Nidec and Nidec Sankyo, each shall retain one copy. 
 April 24, 2012 

 

			
	Nidec:	 	
		
		 	Nidec Corporation
		 	338 Tonoshiro-cho, Kuze, Minami-ku, Kyoto
		 	By: Shigenobu Nagamori, president and representative director
	
	Nidec Sankyo:
		
		 	Nidec Sankyo Corporation
		 	5329 Shimosuwa-machi, Suwa-gun, Nagano
		 	By: Kazuyoshi Yasukawa, president and representative director