diff --git a/src/mame/arcade.lst b/src/mame/arcade.lst
index d25b76e0ca9..05f498f1cdd 100644
--- a/src/mame/arcade.lst
+++ b/src/mame/arcade.lst
@@ -5760,6 +5760,7 @@ scg06nt         // 2005.12 Sega Golf Club 2006: Next Tours (Rev A)
 				// 2006.09 Sega Network Taisen Mahjong MJ 3 Evolution (Rev A)
 				// 2006.10 Quest of D Oukoku no Syugosya Ver.3.00
 				// 2006.11 Quest of D Oukoku no Syugosya Ver.3.01
+mj3evo		// 2007.06 Sega Network Taisen Mahjong MJ 3 Evolution (Rev B)
 				// 2007.11 Quest of D The Battle Kingdom Ver.4.00
 				// 2008.01 Quest of D The Battle Kingdom Ver.4.00b
 				// 2008.02 Quest of D The Battle Kingdom Ver.4.00c
diff --git a/src/mame/drivers/chihiro.c b/src/mame/drivers/chihiro.c
index 3cd3c4c1e32..ba19fb01dba 100644
--- a/src/mame/drivers/chihiro.c
+++ b/src/mame/drivers/chihiro.c
@@ -52,6 +52,7 @@ Games on this system include....
 |*| 2005 | Sega Club Golf 2006: Next Tours (Rev A)            | Sega                     | GDROM  | GDX-0018A  |              |
 | | 2006 | Sega Network Taisen Mahjong MJ 3 Evolution         | Sega                     | GDROM  | GDX-0021   |              |
 | | 2006 | Sega Network Taisen Mahjong MJ 3 Evolution (Rev A) | Sega                     | GDROM  | GDX-0021A  |              |
+|*| 2007 | Sega Network Taisen Mahjong MJ 3 Evolution (Rev B) | Sega                     | GDROM  | GDX-0021B  |              |
 | | 2009 | Firmware Update For Compact Flash Box              | Sega                     | GDROM  | GDX-0024   |              |
 |*| 2009 | Firmware Update For Compact Flash Box (Rev A)      | Sega                     | GDROM  | GDX-0024A  | 317-0567-EXP |
 |*| 2004 | Quest Of D (Ver.1.01C)                             | Sega                     | CDROM  | CDV-10005C |              |
@@ -2931,6 +2932,16 @@ ROM_START( scg06nt )
 	ROM_LOAD("gdx-0018.data", 0x00, 0x50, CRC(1a210abd) SHA1(43a54d028315d2dfa9f8ea6fb59265e0b980b02f) )
 ROM_END
 
+ROM_START( mj3evo )
+	CHIHIRO_BIOS
+
+	DISK_REGION( "gdrom" )
+	DISK_IMAGE_READONLY( "gdx-0021b", 0, SHA1(c97d1dc95cdf1b4bd5d7cf6b4db0757f3d6bd723) )
+
+	ROM_REGION( 0x4000, "pic", ROMREGION_ERASEFF)
+	ROM_LOAD( "317-xxxx-jpn.pic", 0x000000, 0x004000, NO_DUMP )
+ROM_END
+
 /*
 Title             BOX GDROM CF-BOX FIRM
 Media ID          EB08
@@ -3009,8 +3020,9 @@ ROM_END
 /* 0018A */ GAME( 2005, scg06nt,  chihiro,  chihirogd,    chihiro, driver_device, 0, ROT0, "Sega",                     "Sega Club Golf 2006 Next Tours (Rev A) (GDX-0018A)", GAME_NO_SOUND|GAME_NOT_WORKING )
 // 0019
 // 0020
-// 0021     GAME( 2005, mj3evo,   mj3ev,    chihirogd,    chihiro, driver_device, 0, ROT0, "Sega",                     "Sega Network Taisen Mahjong MJ 3 Evolution (GDX-0021)", GAME_NO_SOUND|GAME_NOT_WORKING )
-// 0021A    GAME( 2005, mj3ev,    chihiro,  chihirogd,    chihiro, driver_device, 0, ROT0, "Sega",                     "Sega Network Taisen Mahjong MJ 3 Evolution (Rev A) (GDX-0021A)", GAME_NO_SOUND|GAME_NOT_WORKING )
+// 0021     GAME( 2006, mj3evoo,  mj3evo,    chihirogd,   chihiro, driver_device, 0, ROT0, "Sega",                     "Sega Network Taisen Mahjong MJ 3 Evolution (GDX-0021)", GAME_NO_SOUND|GAME_NOT_WORKING )
+// 0021A    GAME( 2006, mj3evoa,  mj3evo,    chihirogd,   chihiro, driver_device, 0, ROT0, "Sega",                     "Sega Network Taisen Mahjong MJ 3 Evolution (Rev A) (GDX-0021A)", GAME_NO_SOUND|GAME_NOT_WORKING )
+/* 0021B */ GAME( 2007, mj3evo,   chihiro,   chihirogd,   chihiro, driver_device, 0, ROT0, "Sega",                     "Sega Network Taisen Mahjong MJ 3 Evolution (Rev B) (GDX-0021B)", GAME_NO_SOUND|GAME_NOT_WORKING )
 // 0022
 // 0023
 // 0024     GAME( 2009, ccfboxo,  ccfboxa,  chihirogd,    chihiro, driver_device, 0, ROT0, "Sega",                     "Chihiro Firmware Update For Compact Flash Box (GDX-0024)", GAME_NO_SOUND|GAME_NOT_WORKING )