No one is discouraging you from requesting your 
deputy service to ask questions for you.  But 
yes, some of us are encouraging you to do so 
responsibly.  Yes, YJ auctions has the "ask the 
seller" feature, so it would be in your advantage 
to use it when you deem it necessary.  Just 
please don't abuse it.

If you wish to use such a feature frequently, 
sign up and get your own Yahoo! Japan ID and 
account.  Then you could ask the questions 
yourself and use the deputy service only when 
you're ready to bid.  Because to pressure your 
chosen deputy service to ask sellers questions 
too often could hurt your relationship with that 
service.

Deputy services will help you when they can, but 
just don't expect them to serve you and only you 
hand and foot.  They have other customers whom 
they need to serve as well.  If your deputy 
service agrees to ask a seller some questions for 
you, that's great.  If not, please accept such 
refusal with grace and not rant about them not 
serving their customers.  That's entirely unfair.

PLEASE SEE THIS FROM THE P.O.V. OF THE D.S. ...

If you fully read my answer to your post on the 
YJ forum (which I referred to you), you should 
already know this:

Deputy services do not wish to offend or pester 
YJ sellers by asking them too many questions. 
Unlike you, the deputy services also have their 
YJ auction ID ratings to protect.  That means 
that they may refuse to ask certain questions for 
you since they're afraid that may hurt their 
standing with other sellers and bidders.

But if the questions you want them to ask for you 
are smart and specific to the auction, they 
shouldn't have any reason to refuse... unless 
they're too busy.  In that case, there's nothing 
anyone can do.

So please also keep these things in mind always.  
Like I said, if you want to ask a lot of 
questions and frequently, take the time and 
commitment to get your own YJ ID and account.

No one here is trying to be difficult, but please 
consider the concerns of other people.

Some deputy service folks have other real and 
full-time jobs, and are only providing a deputy 
service as a favor to the fans outside Japan.  Of 
course, they'll all try their best to satisfy 
customers but don't expect too much from them in 
certain cases.

Please be fair and moderate yourself.  That's all 
some of us wish to ask of you.