Dr. Shigeo

Rechtsanwalt (Attorney-at-Law)


  • Studies at Ludwig-Maximilians University Munich and Albert-Ludwigs University Freiburg
  • 2000 – 2005 Haarmann, Hemmelrath & Partner
  • Since 2006 Partner with ARQIS (Founding Partner)

Recommendations and Awards

  • Leading Lawyer for Japan related M&A and Corporate Law according to Chambers, JUVE Handbook, azur and Legal500.

  • Quotes from editors, clients and competitors in these publications:

    • “very committed, industrious and goal-oriented lawyer”
    • “well networked in Japan”
    • “very experienced in transactions and pragmatic”
    • “an authority” and “unbeatable” in Japan business
    • “formative personality of the German-Japanese legal advisor scene”
    • “stands out for his suggestions on negotiation strategies”
    • “distinguished for its proven track record in advising blue-chips”
  • “M&A Law Specialist of the Year” (Acquisition International 2017)

  • WirtschaftsWoche portrayed Dr. Shigeo Yamaguchi’s career in 2020.

  • The legal career magazine azur reported on Dr. Shigeo Yamaguchi’s Japan Desk in 2013.


  • Dr. Shigeo Yamaguchi regularly publishes expert papers on M&A and corporate law in books and highly regarded law journals. The arcticles often deal with German-Japanese business, e.g. his publication “Defense measures for listed companies against hostile take-overs in Germany and Japan“ (“Abwehrmaßnahmen börsennotierter Aktiengesellschaften gegen feindliche Übernahmeangebote in Deutschland und Japan”), Carl Heymanns Verlag, 2005

Interested in a consultation?

shigeo.yamaguchi@arqis.comWrite e-mail