Dream/Zensinsyoji, the other manufacture of Japan es erasers is a delight for the collectors. From one shipment to the next form them, often the colors of their Japanese erasers will vary.
Dream/Zensinyoji color changes seem to occur because when the manufacturing takes place, they are not as careful to match to the previous color. The sliced orange Japanese erasers is a good example. On last count, there were 3 versions.
In the most current shipment of the tulip Japanese erasers, we got a pink version of the 3 tulip erasers. Now there are 3 color versions of the tulip Japanese erasers.