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Japanese Holon Research Tower Water PSA Population Report

2005 · 24 cards · 1,214 grades counted · data from October 1, 2026

The PSA population report for Japanese Holon Research Tower Water counts 1,214 grades across 24 cards as of October 1, 2026. 427 of those grades are PSA 10s, a set-wide gem rate of 35.2%. The table lists every card of this set in GemRate's public PSA population tracking, with PSA 10 and PSA 9 counts, total grades, and per-card gem rate.

  • Most graded: Vaporeon EX-Holo (1st Edition) #003, 651 total grades.
  • Fewest PSA 10s: Ditto [Squirtle] #002, 9 PSA 10s out of 44 graded.
#CardPSA 10PSA 9Total gradedGem rate
001 Staryu1st Edition 7 9 16 n/a
001 Staryu 1 0 1 n/a
002 Ditto [Squirtle]1st Edition 65 85 213 30.5%
002 Ditto [Squirtle] 9 19 44 20.5%
003 Vaporeon EX-Holo1st Edition 229 209 651 35.2%
003 Vaporeon EX-Holo 25 25 117 21.4%
004 Marill1st Edition 13 5 19 n/a
004 Marill 2 1 3 n/a
005 Starmie1st Edition 11 13 30 36.7%
005 Starmie 2 0 3 n/a
006 Azumarill1st Edition 14 13 33 42.4%
006 Azumarill 1 2 3 n/a
007 Eevee1st Edition 30 12 51 58.8%
007 Eevee 9 2 14 n/a
008 Potion1st Edition 0 1 1 n/a
009 Master Ball1st Edition 3 0 3 n/a
009 Master Ball 1 0 1 n/a
010 Holon Scientist1st Edition 3 0 3 n/a
010 Holon Scientist 0 1 1 n/a
011 Water Energy1st Edition 0 1 1 n/a
012 Water Energy1st Edition 1 0 1 n/a
013 Water Energy1st Edition 1 0 1 n/a
014 Water Energy1st Edition 0 1 1 n/a
015 Holon Energy WP1st Edition 0 1 3 n/a

Gem rate is PSA 10s as a share of total grades, shown only for cards with at least 25 total grades; smaller samples say almost nothing about real gem odds. Source: GemRate public PSA population tracking, refreshed with every BetterPop data pull. Figures on this page regenerate on every site build.

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