Tweaked the recipe in brewer's friend to get the estimated values close to target.
Title: Asahi Clone
Brew Method: All Grain
Style Name: American Lager
Boil Time: 60 min
Batch Size: 23 liters (fermentor volume)
Boil Size: 28.5 liters
Boil Gravity: 1.036
Efficiency: 75% (brew house)
STATS:
Original Gravity: 1.044
Final Gravity: 1.007
ABV (standard): 4.97%
IBU (tinseth): 17.51
SRM (morey): 2.31
FERMENTABLES:
2.5 kg - German - Pilsner (52.6%)
0.25 kg - American - Carapils (Dextrine Malt) (5.3%)
0.5 kg - Rice Hulls (10.5%)
1.5 kg - Cooked Rice (31.6%)
HOPS:
30 g - Saaz, Type: Pellet, AA: 3.5, Use: Boil for 60 min, IBU: 13.16
20 g - Saaz, Type: Pellet, AA: 3.5, Use: Boil for 15 min, IBU: 4.35
MASH GUIDELINES:
1) Temperature, Temp: 50 C, Time: 30 min, Amount: 25 L, Protein Rest
2) Temperature, Temp: 64 C, Time: 90 min, Amount: 25 L, Sacc Rest
3) Temperature, Temp: 78 C, Time: 10 min, Amount: 25 L, Mash Out
Starting Mash Thickness: 3 L/kg
YEAST:
Fermentis / Safale - Saflager - German Lager Yeast W-34/70
Starter: Yes
Form: Dry
Attenuation (avg): 83%
Flocculation: High
Optimum Temp: 8.89 - 22.22 C
Fermentation Temp: 12 C
Pitch Rate: 1.5 (M cells / ml / deg P)
Might try something like this one day, a few family members enjoy Asahi.