Seasons greetings guys,
It looks like this should have been in 0.272, but I can't see any sign of it anywhere. Very recently promoted to WORKING
ROM_START( yakyuken )
ROM_REGION( 0x4000, "maincpu", 0 )
ROM_LOAD( "4210.bt1", 0x0000, 0x1000, CRC(6cf83735) SHA1(3d0a978adb1c1b4526fa00dedd08e2879f4af283) )
ROM_LOAD( "4211.bg12", 0x1000, 0x1000, CRC(098bf9ff) SHA1(17da91457a6e8154e09361d0600b37156c05f7c2) )
ROM_LOAD( "4212.bg13", 0x2000, 0x1000, CRC(6d02e421) SHA1(489a822a52db39f348282ba92fb1c1d3cbc68710) )
ROM_LOAD( "4213.bg14", 0x3000, 0x0800, CRC(364891c8) SHA1(220cae58877cb6a80d01305375a5945c7dc5cfcc) )
ROM_REGION( 0x800, "audiocpu", 0 )
ROM_LOAD( "4209.bg11", 0x000, 0x800, CRC(44b2b7d1) SHA1(672931ff572ac6361b493dc9a49f6146bdc26b78) )
ROM_REGION( 0x8000, "tiles", 0 )
ROM_LOAD( "4203.r1", 0x0000, 0x1000, CRC(8769aad5) SHA1(71f3d22e8e0006ba89329ac4a48f09e11ab67875) )
ROM_LOAD( "4207.r2", 0x1000, 0x1000, CRC(9b78e95e) SHA1(2f3fdcc3bb92b2eb3a967de39ffe4eee74cac8e0) )
ROM_LOAD( "4202.g1", 0x2000, 0x1000, CRC(a45d5258) SHA1(9080c51b2dc5d6bc4d01cc29deed0e2a5ea78dbd) )
ROM_LOAD( "4206.g2", 0x3000, 0x1000, CRC(e18d50f7) SHA1(c922a019c13c904701abe5a9e42be955d80a7ecb) )
ROM_LOAD( "4201.b1", 0x4000, 0x1000, CRC(838726ab) SHA1(5bcfb3c6badc8f7b7bea17a228137e4bff39a0e5) )
ROM_LOAD( "4205.b2", 0x5000, 0x1000, CRC(58efc253) SHA1(b3344df68c665da996f3332f43030a664931db80) )
ROM_LOAD( "4204.t1", 0x6000, 0x1000, CRC(da77a765) SHA1(e8626548909b5e735cdb603964324482848ce476) )
ROM_LOAD( "4208.t2", 0x7000, 0x1000, CRC(be97d733) SHA1(ff3b199c8d1203d9d6c0060f217bbd7de32a8152) )
ROM_END
Many thanks.