Whisk the eggs, sugar, and honey until smooth and slightly pale.
Sift in the flour and baking soda and fold until just combined. Stir in the water, cover, and rest for 15 minutes.
Cook the pancakes:
Heat a nonstick skillet over medium-low heat and wipe it with a thin film of oil.
Scoop small rounds of batter into the skillet. Cook until bubbles form and the surface loses its shine, then flip and cook the second side for about 30 seconds.
Transfer to a plate and cover with a towel while repeating with the remaining batter.
Fill and serve:
Spread red bean paste on the browned side of half the pancakes.
Top with the remaining pancakes and press gently around the edges.
Serve with tea.
Notes
Keep the heat moderate for evenly colored pancakes.
A little extra water can loosen batter that thickens during resting.