The funding is expected to be announced tomorrow morning.

(Update: Rakuten confirmed the deal in a press release, which is below.)

The Tokyo-based Internet giant will invest upwards of $50 million in a $100 million round that values the social bookmarking phenom at $1.5 billion.

There might be other individual investors in the new round, but those were still to be determined tonight by Pinterest co-founder and CEO Ben Silbermann.

(Correction: We previously reported it was a $120 million round, but sources said it is $100 million. It’s possible more could still be added, as we heard conflicting accounts.)

While the latest round of funding for Pinterest has been the most hotly sought of late in tech circles, one source said Silbermann was looking for a global strategic investor and had talked to several large Asian companies.

Said one source on why he settled on Rakuten: “He just really liked them.”

The current investors in Pinterest, which is a social collection site where users can “pin” their interests via a handsome graphical interface, include Andreessen Horowitz, Bessemer Venture Partners and FirstMark Capital, as well as several well-known angel investors. That group had valued the company at $200 million last October, and are joining the new round pro rata.

Founded in 2008, Pinterest had previously raised a little under $40 million in funding.

It’s interesting that the latest round was not led by an institutional investor, since everyone and their mother wanted in on the deal. Sources said no new venture capital firms were included in the round and that is the way Pinterest’s quirky leadership wanted it.

Sources said Silbermann has been concerned with Pinterest’s global growth as well as fending off international clones, and was looking for a partner with which the start-up could work closely.

“Ben did not want any more VCs,” said one source. “He wanted an investor that moved the company forward.”

Rakuten will presumably help advise Pinterest on turning their pretty pictures into purchases, as commerce is already starting to emerge naturally on the site.

It’s a good choice of partners in that regard. Rakuten is one of the largest e-commerce companies in the world, with a flagship site Rakuten Ichiba. It was founded in 1997 and had revenues of $4.7 billion in 2011. Its CEO is Hiroshi Mikitani, whose nickname is Mickey.

One the richest men in Japan, Mikitani is one of the best known entrepreneurs there; he has been described as “Richard Branson meets Jeff Bezos.”

Earlier today, The Next Web reported that the funding was coming this week and said the company was looking at international partners, but it did not name Rakuten.

Rakuten Leads Investment In Pinterest

Global social commerce pioneer takes stake in online sharing service

TOKYO, May 17, 2012 – Rakuten, one of the world’s largest online marketplaces, today announced that it is leading a $100M investment in Pinterest, with participation from existing investors Andreessen Horowitz, Bessemer Venture Partners, and FirstMark Capital, as well as a number of angel investors.

The funding will allow Pinterest to continue improving its service and expanding its community globally. The investment also marks the start of a strategic partnership between Rakuten and Pinterest to help expand in Japan and into Rakuten’s 17 other global markets.

Hiroshi Mikitani, CEO of Rakuten said: “While some may see e-commerce as a straightforward vending machine-like experience, we believe it is a living process where both retailers and consumers can communicate, discover, and curate to make the experience more entertaining. We see tremendous synergies between Pinterest’s vision and Rakuten’s model for e-commerce. Rakuten looks forward to introducing Pinterest to the Japanese market as well as other markets around the world.”

Ben Silbermann, co-founder and CEO of Pinterest, said: “Our goal is to help people discover things they love, by connecting people through their shared interests. Bringing Rakuten on board gives us an amazing opportunity to move a step closer to this goal.”

Rakuten ranks among the top 10 internet companies in the world. Among its numerous online properties, its flagship B2B2C (business-to-business-to-consumer) model e-commerce site Rakuten Ichiba is the largest e-commerce site in Japan and among the world’s largest by sales. Its global presence has been reinforced through the acquisitions of leading online marketplaces Buy.com (US), Priceminister (France), Ikeda (now Rakuten Brasil), Tradoria (now Rakuten Deutschland) and Play.com (UK), and investments in Ozon.ru and AHA Life. Whereas other marketplaces may compete directly with sellers, Rakuten’s model seeks to empower merchants to deliver Omotenashi, a Japanese high service mindset, which helps sellers create lasting relationships with customers.

And here’s a video of Kara pontificating away on the subject for WSJ.com’s “Digits” show:

The program, which Amazon announced Wednesday, is supposed to replace ordinary login and password combinations with a phrase and PIN combination that are linked to a specific account and shipping address. The distinction is subtle: You have one Amazon login and password (which aren’t going away), but you can have multiple PayPhrases that are linked to specific aspects of your account, like different shipping addresses or credit cards.

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This week, I gathered up some useful shortcuts that come built into most of the BlackBerrys, even older models, made by Research In Motion Ltd. but not many owners actually use or know about them. Ironically, most of these shortcuts are conducted using a BlackBerry feature that the iPhone lacks: its physical keyboard. (The iPhone uses a virtual keyboard that appears on-screen only when needed.)

Some useful shortcuts are built into most BlackBerrys, even older models, though not many owners actually use or know about them. Most of these shortcuts are conducted using a BlackBerry feature that the iPhone lacks: its physical keyboard.

Some of these shortcuts are seemingly obvious, like number or capitalization locks, but others are more obscure, like codes that can be entered to display the BlackBerry’s precise signal strength. Some shortcuts are performed with a single keystroke; others work in conjunction with a trackwheel or trackball, depending on your BlackBerry model, and still others work when two keys are pressed simultaneously. BlackBerrys with condensed keyboards that use auto-correcting SureType may require extra or different keystrokes.

Navigation Simplified

A series of keystrokes work in various BlackBerry applications to make navigation much faster. Pressing the Space bar works like Page Down on a computer keyboard, moving down one screen per press. Holding Shift while pressing the Space bar moves in the opposite direction, like the Page Up key. To quickly move to the very top or bottom of a page, press “T” or “B,” respectively. Another way to page down or up through lists is to hold the ALT key while scrolling with the trackwheel.

Users can toggle between the BlackBerry’s running applications without the extra step of navigating back to the Home screen. To do this, press ALT and the Escape key, then release Escape and use the trackwheel to scroll through a display of icons that represent running programs until you reach the desired program, then release the ALT key to select that program.

Messaging Magic

Shortcuts in BlackBerry messaging can be a real boon when you’re trying to get work done quickly. While looking at a list of emails, hit “C” to immediately start composing a new email. When a specific email is highlighted, pressing “R” will reply to that message; “L” will reply to all and “F” will forward it. Hitting “J” while an email is highlighted will jump directly to the oldest message in that email chain.

A list of emails can be more neatly organized from the message screen by holding the ALT key and pressing a letter. “I” will alter the list to show only incoming emails, “O” will show just those emails that were sent. “P” shows a phone log, including dates and times, and “s” displays all SMS messages made or received on the BlackBerry.

In the body of a message, pressing the Space bar twice inserts a period and capitalizes the next word. When the left Shift key and ALT are pressed together, the keyboard’s number lock is on; the right Shift key and ALT work as the caps lock. Holding any letter down will capitalize it, saving users from pressing another key to do so. To type a letter with an accent, hold the letter key down while scrolling up or down with the trackwheel until you find the correctly accented letter.

Type Less, Say More

While composing emails, a series of AutoText codes can be typed in the email body to automatically display certain phrases or information. Typing “mynumber” and a space in the text of an email will automatically display your BlackBerry’s phone number. Similarly, when “LD” is entered the local date is displayed, and when “LT” is typed the local time appears.

If your email inbox is full and you can’t send emails, find out the PIN of your recipient’s BlackBerry and use it to message the person directly. (To find your own PIN, type “mypin” and a space into the body of an email. This code can be used to send PIN messages from one device to another without using the device’s usual email system.)

Geeky Codes

If you’re just dying to know some techie details about your BlackBerry, the “Help Me!” screen will be right up your alley. To view the “Help Me!” screen, press ALT, Shift and “H” simultaneously. This displays data that won’t matter much to the average person, such as the device’s vendor ID, platform and free file space. But it also shows the exact percentage of remaining battery power on the BlackBerry, which could be helpful if you aren’t sure how to interpret the imprecise battery indicator bars at the top of the home screen.

Another way to geek up your BlackBerry is to change its signal strength indicator from bars to numbers that tell how many decibels per milliwatt the device is transmitting. To do this, go to the Home screen and hold down the ALT button while typing “NMLL.” My BlackBerry displayed a minus 75 when I made this change. Strengths of minus 50 to minus 90 are said to be good, while anything higher, like minus 100, isn’t. Though this numerical indicator won’t likely be of any practical use, you could use it to turn to a friend and compare reception during an excruciatingly boring meeting.

One way to impress a technophile on a date is by pulling up a BlackBerry’s Event Log. To do this, go to the Home screen and hold down ALT while typing “LGLG.” This retrieves a long list of numerous confusing codes representing the functions that were performed on your device. The Menu screen in the Event Log gives users the option to clear this log, freeing up some BlackBerry memory, while an Options screen lets people set the log up to record only certain kinds of activities.

Finally, to reboot your BlackBerry without removing its plastic back and taking out the battery, press ALT, Right Shift and Delete simultaneously. More codes can be found in the blogosphere or in a special section of RIM’s Web site: http://na.blackberry.com/eng/support/blackberry101/tips/. Adopting just one of these shortcuts can significantly change the way you use your BlackBerry.

Edited by Walter S. Mossberg

Write to Katherine Boehret at mossbergsolution@wsj.com