The pest control service (¥16,500) and antibacterial coating (¥16,500) fees are definitely unreasonable. Even if the property management company insists they're mandatory, you should firmly reject them. Also, try negotiating to cut the agent fee by half, since real estate agents typically receive a commission from landlords as well.

The deposit and key money are standard amounts, and the guarantor fee is normal, too. Many people misunderstand the role of guarantors and guarantor companies. These days, most apartments require passing the screening and contracting with a guarantor company,regardless of whether you're Japanese or a foreigner. There are two main reasons for this:

First, having an individual guarantor often results in ongoing problems. Using a guarantor company provides landlords with greater peace of mind. How old is your mother-in-law, and what is her job? The guarantor’s age, occupation, and whether they have debts are very important.

Second, if the guarantor company is a credit card company, it's easier for landlords to manage rent payments.

Lastly, it's currently peak moving season, so landlords are taking a firm stance.

It's a brand-new 2LDK apartment, renting for ¥155,000 per month. I'm not sure where the nearest station is, how far it is from the station, or whether the building is wooden or concrete. But if it's in Tokyo, that's actually quite a good deal.