シンガーソングライター大石昌良がエンターテイナーとしての側面を強めてアニメやゲーム楽曲等を歌う時に使用する名義。2001年にスリーピースバンド「Sound Schedule」のボーカル＆ギターとしてメジャーデビューし、2008年に大石昌良としてソロ活動を開始、2014年よりオーイシマサヨシ名義として自身3度目のデビューを果たす。以降、「ようこそジャパリパークへ」、「サインはB」など多くのアニメ楽曲を手掛け、Tom-H@ckとのユニット「OxT」としての活動や、アーティストへの楽曲提供を行うなど名義を使い分けて活動の幅を広げる。2027年2月27日・28日に初の横浜アリーナでのワンマンライブ『オーイシ横アリ』2Days開催、さらに2027年10月23日・24日にはオーイシ武道館 Vol.4&Vol.5を開催する。
| 日付 | 登録者 | 変化 | 再生回数 | 変化 | 動画数 | 変化 |
|---|---|---|---|---|---|---|
| 10-25 11:30最新 | 469,000 | 0 | 356,338,171 | 0 | 393 | 0 |
| 10-24 11:36 | 469,000 | +1,000 | 356,338,171 | 0 | 393 | 0 |
| 10-23 11:30 | 468,000 | 0 | 356,338,171 | 0 | 393 | 0 |
| 10-22 11:39 | 468,000 | 0 | 356,338,171 | 0 | 393 | 0 |
| 10-21 11:30 | 468,000 | 0 | 356,338,171 | 0 | 393 | 0 |
| 10-20 11:36 | 468,000 | 0 | 356,338,171 | +472,001 | 393 | +1 |
| 10-19 11:28 | 468,000 | 0 | 355,866,170 | +357,972 | 392 | 0 |
| 10-18 11:35 | 468,000 | 0 | 355,508,198 | +1,077,617 | 392 | +1 |
| 10-17 11:29 | 468,000 | 0 | 354,430,581 | 0 | 391 | +1 |
| 10-16 11:36 | 468,000 | +1,000 | 354,430,581 | 0 | 390 | 0 |
| 10-15 11:30 | 467,000 | 0 | 354,430,581 | +410,487 | 390 | +1 |
| 10-14 11:36 | 467,000 | 0 | 354,020,094 | +1,190,954 | 389 | 0 |
| 10-13 11:29 | 467,000 | 0 | 352,829,140 | 0 | 389 | +1 |
| 10-12 11:35 | 467,000 | 0 | 352,829,140 | 0 | 388 | 0 |
| 10-11 11:34 | 467,000 | 0 | 352,829,140 | +1,494,206 | 388 | 0 |
| 10-10 11:35 | 467,000 | +1,000 | 351,334,934 | 0 | 388 | +1 |
| 10-09 11:26 | 466,000 | 0 | 351,334,934 | 0 | 387 | 0 |
| 10-08 11:36 | 466,000 | 0 | 351,334,934 | 0 | 387 | 0 |
| 10-07 11:27 | 466,000 | 0 | 351,334,934 | +830,313 | 387 | +1 |
| 10-06 11:34 | 466,000 | 0 | 350,504,621 | 0 | 386 | +1 |
| 10-05 11:27 | 466,000 | 0 | 350,504,621 | +1,886,876 | 385 | +1 |
| 10-04 11:35 | 466,000 | +1,000 | 348,617,745 | 0 | 384 | 0 |
| 10-03 11:27 | 465,000 | 0 | 348,617,745 | 0 | 384 | +1 |
| 10-02 11:38 | 465,000 | 0 | 348,617,745 | 0 | 383 | +1 |
| 10-01 11:27 | 465,000 | 0 | 348,617,745 | +1,503,315 | 382 | -1 |
| 09-30 11:35 | 465,000 | 0 | 347,114,430 | 0 | 383 | +1 |
| 09-29 11:29 | 465,000 | 0 | 347,114,430 | 0 | 382 | +1 |
| 09-28 13:00 | 465,000 | +1,000 | 347,114,430 | +609,446 | 381 | +2 |
| 09-27 11:30 | 464,000 | 0 | 346,504,984 | +796,296 | 379 | +1 |
| 09-26 11:36 | 464,000 | 0 | 345,708,688 | 0 | 378 | 0 |
| 09-25 11:28 | 464,000 | 0 | 345,708,688 | +939,259 | 378 | +1 |
| 09-24 11:36 | 464,000 | +1,000 | 344,769,429 | +754,941 | 377 | 0 |
| 09-23 11:27 | 463,000 | 0 | 344,014,488 | +560,977 | 377 | +1 |
| 09-22 11:35 | 463,000 | 0 | 343,453,511 | +1,456,157 | 376 | +2 |
| 09-21 11:27 | 463,000 | +1,000 | 341,997,354 | +320,598 | 374 | +2 |
| 09-20 11:36 | 462,000 | -1,000 | 341,676,756 | +1,643,327 | 372 | +1 |
| 09-19 11:29 | 463,000 | +1,000 | 340,033,429 | 0 | 371 | +1 |
| 09-18 11:36 | 462,000 | 0 | 340,033,429 | +778,262 | 370 | 0 |
| 09-17 11:30 | 462,000 | +1,000 | 339,255,167 | +1,024,912 | 370 | +4 |
| 09-16 11:36 | 461,000 | 0 | 338,230,255 | 0 | 366 | 0 |
| 09-15 11:25 | 461,000 | 0 | 338,230,255 | 0 | 366 | 0 |
| 09-14 11:33 | 461,000 | 0 | 338,230,255 | +507,944 | 366 | -2 |
| 09-13 11:24 | 461,000 | 0 | 337,722,311 | +700,445 | 368 | +1 |
| 09-12 11:35 | 461,000 | +1,000 | 337,021,866 | +2,218,192 | 367 | +1 |
| 09-11 11:26 | 460,000 | 0 | 334,803,674 | 0 | 366 | 0 |
| 09-10 11:35 | 460,000 | 0 | 334,803,674 | 0 | 366 | +1 |
| 09-09 11:24 | 460,000 | 0 | 334,803,674 | +354,810 | 365 | 0 |
| 09-08 11:33 | 460,000 | 0 | 334,448,864 | +252,454 | 365 | +1 |
| 09-07 11:25 | 460,000 | 0 | 334,196,410 | +197,124 | 364 | +1 |
| 09-06 11:32 | 460,000 | +1,000 | 333,999,286 | +3,401,746 | 363 | +1 |
| 09-05 11:25 | 459,000 | 0 | 330,597,540 | 0 | 362 | 0 |
| 09-04 11:33 | 459,000 | 0 | 330,597,540 | 0 | 362 | 0 |
| 09-03 11:26 | 459,000 | 0 | 330,597,540 | 0 | 362 | 0 |
| 09-02 11:40 | 459,000 | 0 | 330,597,540 | 0 | 362 | 0 |
| 09-01 11:30 | 459,000 | +1,000 | 330,597,540 | 0 | 362 | 0 |
| 08-31 11:40 | 458,000 | 0 | 330,597,540 | 0 | 362 | 0 |
| 08-30 11:31 | 458,000 | 0 | 330,597,540 | 0 | 362 | 0 |
| 08-29 11:43 | 458,000 | 0 | 330,597,540 | 0 | 362 | 0 |
| 08-28 13:27 | 458,000 | +1,000 | 330,597,540 | +1,968,198 | 362 | 0 |
| 08-27 11:42 | 457,000 | 0 | 328,629,342 | 0 | 362 | +1 |
| 08-26 11:31 | 457,000 | 0 | 328,629,342 | 0 | 361 | 0 |
| 08-25 11:41 | 457,000 | 0 | 328,629,342 | 0 | 361 | 0 |
| 08-24 11:32 | 457,000 | 0 | 328,629,342 | 0 | 361 | 0 |
| 08-23 11:41 | 457,000 | 0 | 328,629,342 | 0 | 361 | 0 |
| 08-22 11:30 | 457,000 | 0 | 328,629,342 | +75,460 | 361 | 0 |
| 08-21 11:43 | 457,000 | 0 | 328,553,882 | 0 | 361 | +1 |
| 08-20 11:31 | 457,000 | 0 | 328,553,882 | 0 | 360 | 0 |
| 08-19 11:41 | 457,000 | 0 | 328,553,882 | 0 | 360 | 0 |
| 08-18 11:30 | 457,000 | 0 | 328,553,882 | 0 | 360 | 0 |
| 08-17 11:43 | 457,000 | 0 | 328,553,882 | 0 | 360 | 0 |
| 08-16 11:29 | 457,000 | +1,000 | 328,553,882 | +2,905,959 | 360 | 0 |
| 08-15 11:42 | 456,000 | 0 | 325,647,923 | 0 | 360 | 0 |
| 08-14 11:28 | 456,000 | 0 | 325,647,923 | 0 | 360 | +1 |
| 08-13 11:43 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-12 11:27 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-11 11:43 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-10 11:27 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-09 11:39 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-08 11:28 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-07 11:43 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-06 11:28 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-05 11:41 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-04 11:26 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-03 11:42 | 456,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 08-02 11:25 | 456,000 | +1,000 | 325,647,923 | 0 | 359 | 0 |
| 08-01 11:41 | 455,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 07-31 11:23 | 455,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 07-30 11:44 | 455,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 07-29 11:18 | 455,000 | 0 | 325,647,923 | 0 | 359 | 0 |
| 07-28 22:49 | 455,000 | 325,647,923 | 359 |