Are the release dates for: 改造テープ 2003-11-02 公式エミュレータ 2005-03-05 correct ones? Some years ago, various (western) sites always stated: 改造テープ 1998-04-12 公式エミュレータ 1998-06-08 However, these might have been wrong. More confusingly, the Japanese Wikipedia entry writes: 改造テープ 2003 公式エミュレータ 1998 Is there any other good source for these?

I am hesitant to call any of these dates correct, but I suspect that both these releases are from the early 2000s.

改造テープ is marked 昭和78年作品, which, if Showa went on for so long, would have been 2003 ("product of Showa 78 = 2003"). I'm not sure if we can round it down much more without any flyers, etc.

公式エミュレータ is marked "2661年4月23日収録", which to me means "[recorded audio taken from] 2661-04-13". Now, 2661 in imperial years (皇紀), is equivalent to 2001. This would mean that this CD-R either contains audio from 2001-04-13, or that it was released on 2001-04-13. Now, as for what is true, who knows...