A Tokyo court will hear opening remarks Wednesday in a high-profile lawsuit filed by New York investment bank Lehman Brothers Inc., which is seeking reimbursement for $350 million it says was swindled from it by employees of Japanese trading giant Marubeni Corp.

Lehman says a pair of Marubeni employees, as well as executives at two smaller companies, presented bogus documents, fake corporate seals and an impostor to convince Lehman officials that a partnership it was joining was a legitimate business. The purported partnership...