Table:
0
A
B
C
D
E
F
1
English
Japanese
Kana spelling
Revised Hepburn
Kunrei-shiki
Nihon-shiki
2
Roman characters
ローマ字
ローマじ
rōmaji
rômazi
rômazi
3
Mount Fuji
富士山
ふじさん
Fujisan
Huzisan
Huzisan
4
tea
お茶
おちゃ
ocha
otya
otya
5
governor
知事
ちじ
chiji
tizi
tizi
6
to shrink
縮む
ちぢむ
chijimu
tizimu
tidimu

Questions and formulas:
Question: how many revised hepburn when english is roman characters
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="Roman characters"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,A2:A6="Roman characters"),4))
Level: medium
Question: when chiji is revised hepburn what are all the english
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="chiji"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,D2:D6="chiji"),1))
Level: medium
Question: how many number of english when kunrei-shiki is otya
Formula: ROWS(UNIQUE(FILTER(A1, E1="otya")))
Formula2: ROWS(UNIQUE(FILTER(A2:A6, E2:E6="otya")))
Level: medium
Question: how many kana spelling when english is mount fuji 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="Mount Fuji"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,A2:A6="Mount Fuji"),3))
Level: medium
Question: when english is tea how many nihon-shiki
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="tea"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,A2:A6="tea"),6))
Level: medium