Consent of Independent Registered Public Accounting Firm

MediciNova, Inc.

La Jolla, California

We consent to the reference to our firm under sections “V-5 outline of Corporate Governance and VI. Financial Condition” in Part I “Information of the Company” and to the use of our reports dated February 25, 2016 with respect to the consolidated financial statements of MediciNova, Inc., and the effectiveness of internal control over financial reporting of MediciNova, Inc. included in the Annual Securities Report for the year ended December 31, 2015, filed with Kanto Zainu Kyoku in Japan.

/s/ BDO USA, LLP

La Jolla, California

June 10, 2016

※　上記は、監査人の同意書の署名付原本に記載された事項を電子化したものであり、その原本は有価証券報告書提出会社が別途保管しております。

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