Edit: Actually looking at it, the number of "anticipated exclusives" in Japan between Xbox 1 & 360 is pretty comparable! For comparison, I used only sequels who (1) weren't simply limited to exclusivity windows and (2) were in a series or franchise who'd sold reasonably well on consoles (100k+) in at least the previous gen...
Xbox
- Crazy Taxi 3: High Roller (Sega)
- Dead or Alive 3 (Tecmo)
- Dead or Alive Ultimate (Tecmo)
- Dead of Alive Xtreme Beach Volleyball (Tecmo)
- Dino Crisis 3 (Capcom)
- GunGriffon: Allied Strike (Game Arts)
- Ninja Gaiden (Tecmo)
- Panzer Dragoon Orta (Sega)
- Sega GT 2002 (Sega)
- Shin Megami Tensei NINE (Atlus)
- The House of the Dead III (Sega)
- Touge R (Atlus)
Xbox 360
- Ace Combat 6: Fires of Liberation (Namco)
- Bomberman: Act Zero (Hudson)
- Dead or Alive 4 (Tecmo)
- Dead or Alive Xtreme 2 (Tecmo)
- Earth Defense Force 2017 (D3 Publisher)
- Guilty Gear 2 Overture (Arc System Works)
- Magna Carta 2 (Bandai)
- Mobile Suit Gundam: Operation Troy (Bandai)
- Onechanbara: Bikini Samurai Squad (D3 Publisher)
- Samurai Showdown Sen (SNK Playmore)
- Tenchu Z (From Software)
- Tengai Makyou: Ziria (Hudson)
- ZOIDS Alternative (Tomy)











