They appear to be a legit company, however there's nothing to say the person you talked to has anything to do with them.
OSAKA, Japan--(BUSINESS WIRE)--Japanese Wealth Management company Saikyo Sakura Assets has commented on the recent rally in Hong Kong stock markets. The Hang Seng Index surged over 1.5 percent with 47 out of the 50 constituent stocks showing gains.
This person could have easily pointed you to the legitimate website, which would have the legit links to legit social media sites. The question is if the phone number is the same as any found on the website or any that is related to the company. Just because it's not on the website, it doesn't mean it's not a number they use for business contacts or is a shared number for a call center or a third party call center.
Because this company probably uses third party call centers in their normal course of business, even contacting them directly and asking if the person you talked to is related to the company is no guarantee they can find the person you're asking for. Even if that person is, there's nothing guaranteeing that's who you spoke to, since the caller could have lied about their name. The only way you'd know is if you were allowed to talk to this person through the actual business phone lines. If they recognized who you were, then it might be legit.
Finding out if the phone number they called you from has anything to do with the company or their possible third party call centers is simply not worth the time and effort. The gains stated in the above article aren't anywhere near 50% growth, and you won't find that kind of growth anywhere else, as Philip stated.
This is 100% a scam. If you want, you can report it. Reporting it might save someone else from getting scammed. This assumes you live in the USA. There's a
Japan tag, but I'm kind of assuming that's because of the supposed source of the call. If nothing else, the below will help future people in the USA. If the OP really is in Japan, there are ways to report scams there. I can't find any, since everything I see is USA related. I do, however, see that telephone scams there are a big problem as of 6 months ago.
Report Phone Scams
If you’ve lost money to a phone scam or have information about the company or scammer who called you, report it at ftc.gov/complaint.
If you didn’t lose money and just want to report a call, you can use our streamlined reporting form at donotcall.gov.
Report the number that appears on your caller ID — even if you think it might be fake — and any number you’re told to call back. The FTC analyzes complaint data and trends to identify illegal callers based on calling patterns. We also use additional information you report, like any names or numbers you’re told to call back, to track down scammers.
The above link and the one below have examples and other information about scams, if you're interested.
Report Scams and Fraud
With so many kinds of scams and fraud, it’s hard to figure out where to report each type. First, file a report with your local police department. You may also contact your state consumer protection office. You can also report certain types of scams and fraud to federal enforcement agencies. Federal agencies usually can’t act on your behalf, but they can use complaints to record patterns of abuse. This helps them take action against a company or industry. Contact these federal agencies based on the type of fraud:
And another link referenced in the above article: