**302 Certification** **Exhibit 12**
     I, Fujio Mitarai, certify that:
     1.   I have reviewed this annual report on Form 20-F of Canon Inc.;
     2.   Based on my knowledge, this report does not contain any untrue statement of a material factor omit to state a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading with respect to the periodcovered by this report;
     3.   Based on my knowledge, the financial statements, and other financial information includedin this report, fairly present in all material respects the financial condition, results ofoperations and cash flows of the company as of, and for, the periods presented in this report;
     4.   The company’s other certifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the company and have:
    (a)   Designed such disclosure controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to ensure that materialinformation relating to the company, including its consolidated subsidiaries, is made knownto us by others within those entities, particularly during the period in which this reportis being prepared;
    (b)   (Paragraph omitted pursuant to SEC Release Nos. 33-8238 and 34-47986)
    (c)   Evaluated the effectiveness of the company’s disclosure controls and proceduresand presented in this report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by this report based on suchevaluation; and
    (d)   Disclosed in this report any change in the company’s internal control overfinancial reporting that occurred during the period covered by the annual report that hasmaterially affected, or is reasonably likely to materially affect, the company’s internalcontrol over financial reporting; and
     5.   The company’s other certifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to the company’s auditors and the auditcommittee of the company’s board of directors (or persons performing the equivalent functions):
    (a)   All significant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely to adversely affectthe company’s ability to record, process, summarize and report financial information; and
    (b)   Any fraud, whether or not material, that involves management or other employeeswho have a significant role in the company’s internal control over financial reporting.
Date: June 13, 2005           /s/ Fujio Mitarai    Fujio Mitarai    President and Chief Executive Officer  
 

 
     
**302 Certification**
     I, Toshizo Tanaka, certify that:
     1.   I have reviewed this annual report on Form 20-F of Canon Inc.;
     2.   Based on my knowledge, this report does not contain any untrue statement of a material factor omit to state a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading with respect to the periodcovered by this report;
     3.   Based on my knowledge, the financial statements, and other financial information includedin this report, fairly present in all material respects the financial condition, results ofoperations and cash flows of the company as of, and for, the periods presented in this report;
     4.   The company’s other certifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the company and have:
    (a)   Designed such disclosure controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to ensure that materialinformation relating to the company, including its consolidated subsidiaries, is made knownto us by others within those entities, particularly during the period in which this reportis being prepared;
    (b)   (Paragraph omitted pursuant to SEC Release Nos. 33-8238 and 34-47986)
    (c)   Evaluated the effectiveness of the company’s disclosure controls and proceduresand presented in this report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by this report based on suchevaluation; and
    (d)   Disclosed in this report any change in the company’s internal control overfinancial reporting that occurred during the period covered by the annual report that hasmaterially affected, or is reasonably likely to materially affect, the company’s internalcontrol over financial reporting; and
     5.   The company’s other certifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to the company’s auditors and the auditcommittee of the company’s board of directors (or persons performing the equivalent functions):
    (a)   All significant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely to adversely affectthe company’s ability to record, process, summarize and report financial information; and
    (b)   Any fraud, whether or not material, that involves management or other employeeswho have a significant role in the company’s internal control over financial reporting.
Date: June 13, 2005           /s/ Toshizo Tanaka    Toshizo Tanaka    Senior Managing Director,