Totals

• 197,000 yen in one-off major costs (flights and accommodation)
• 25,500 yen in daily costs
• ??? yen in special costs
• Over 60,000 yen in otaku goods

So... about 283,000 yen (3300 AUD). And other as-yet-unknown costs.

Dailies

• Suica - 1000 yen per day?
• Food - 2000 yen per day? last time was around 1500 per day, for konbini food

One-off major costs

• hotel - ~53,000 yen?
• Concert tickets - ~540 AUD
• Airfares - ~1040 AUD
• Wifi rental - 4500 yen
• Keitai rental - 4500 yen

Special costs

• Mogra cover charge - 2000 yen?
• Kanshasai merchandise - ??? yen
• Lightsticks = ??? yen
• Kanshasai drink token - 500 yen

Goods

This is all extremely rough.

• furinkan's stuff - 30,000 yen
• Ast's figures - 29,000 yen
• Ast's books - 2,000 yen
• Retrovertigo's stuff - ??? 20,000 yen?

Calculations

Number of days

• 3rd - half-day
• 4th
• 5th
• 6th
• 7th
• 8th
• 9th
• 10th
• 11th

Results:

• 8 full days and 1 half-day
• 8 nights of accommodation

Rentafone

First day is... the 3rd?

• 3rd - 1st day
• 4th
• 5th
• 6th
• 7th
• 8th
• 9th - 7th day
• 10th - 8th day
• 11th - 9th day - mail it back

Per device = 9 days = 1 week + 2 days = 3900 + (2x300) = 4500 yen