Krdytkyu

This can be considered a mantra.

a word or phrase that is repeated often or that expresses someone's basic beliefs

[MW]

Typically a mantra is smaller, but the word evokes the kind of thoughtless droning mantra implies. I imagine this is the case in your office.

This can be called pledge.

From Merriam-Webster:

PLEDGE (noun):

a binding promise or agreement to do or forbear.

a token, sign, or earnest of something else

I would call this a company values statement.  (Or possibly a vision statement.)

I wouldn't call it a mission statement or manifesto, because it doesn't define what the company does; only how it does it.

Nor would I call it a credo or mantra, because it doesn't list things that employees believe, only things that they do.

It could be a company pledge, vow, oath, or similar (as per other answers) — but if so, I'd expect everyone to be saying every line, all together.

(And you wouldn't get UK employees to spout this rubbish every morning without a lot of sarcasm…!)

Every morning at work, we recite the company manifesto.

manifesto

​ a written statement of the beliefs, aims, and policies of an
organization, especially a political party:

In the West, we use this mainly in political contexts, but from your description it sounds like this is not so removed from a political or religious situation.

I would call this 'the company mission'.
According to Merriam-Webster's Dictionary:
MISSION (noun) -
a specific task with which a person or a group is charged.
For example, 'Their mission was to help victims of the disaster.'

Affirmations - statements that we tell ourselves in order to spark self-change (Steele, 1988)

I work for Panasonic where we have a similar activity^*, and their English web site calls our 7 things seven principles - see about halfway down the page. Perhaps your company has a similar English page that has an official name for them?

^{* At least we only have to repeat them once a week!}

Additionally, I decided to look up the Japanese definition. First, the OP's thing is the TB Way, and the Japanese version also calls it the TB Way - see the English heading about halfway down.

As for Panasonic, they are called 七精神, nana (7) seishin, and seishin can be translated as spirit.

Real things that are hidden behind, are your company core values (definition from yourdictionary.com)

The 'material' ('touchable') thing you can see is implementation/manifestation/embodiment of your company core values.

I would say that this could be considered tenets of the company/team.
Definition of tenet (from Oxford Living Dictionaries: English)

A principle or belief, especially one of the main principles of a religion or philosophy.

'the tenets of classical liberalism'

Synonyms: principle, belief, doctrine, precept, creed, credo, article of faith, dogma, canon, rule

This sort of company or organizational statement can have several different definitions, depending on how it is used. It could certainly be a mission statement or pledge, and comes out of your companies core values, as suggested in other answers. The ritual manner used to recite this statement is similar to a mantra, as suggested in another. These words all have different nuances. In your particular case, though, this is specifically the TB Way (TB, as in the Toyota Boshoku Company). It is part of their corporate philosophy. (See below for the complete version from the above link).

Way in this context refers to the manner in which the company does things. Many Japanese companies have one, and they are typically translated as "the [company name] way". So...

Every morning at work we stand up and recite the company way.

See definition 1.

Oxford:

way:

1. A method, style, or manner of doing something; an optional or alternative form of action.

From the Toyota Boshoku website:

TB Way:

• We contribute to society by developing leading-edge technologies and manufacturing high-quality products.


• We meet challenges with courage and creativity, to realize our dreams.


• We carry out kaizen continuously, aiming to achieve higher goals.


• We practice Genchi-Genbutsu by going to the source to analyze problems and find their root causes.


• Once a decision is made, we move quickly to carry out the plan, with passion and a sense of mission.


• We seek to do our best, act professionally and take responsibility for our actions.


• We respect the values of other cultures and accept differences, with an open mind and a global perspective.


• As a good corporate citizen, we do what is right and contribute to society.


• We respect the individual and use teamwork to produce the best result.

This sounds like a company motto.

2: a short expression of a guiding principle

Posters like that in the workplace have also been called “motivators,” and parodies of them with cute pictures and sarcastic, nihilistic messages are “demotivators.”

Another idea that comes to my mind posting as a separate answer to allow independent evaluation

All employees of your company, commit themselves to follow that rules.

Ergo, we can simply say that these are their commitments definition from www.vocabulary.com

The first thing I thought of was litany:

1. A series of petitions for use in church services or processions, usually recited by the clergy and responded to in a recurring formula by the people.




2. A tedious recital or repetitive series.

Source: Oxford

One of the things you didn't specify was how you felt about having to say all this stuff. "Litany" is a good sarcastic word to describe a tedious, pseudo-religious rectiation of empty formulae, something ridiculous that bosses make employees do just to demonstrate who's in charge.

My suggestions:

"vow"

1. A solemn promise to perform some act, or behave in a specified manner, especially a promise to live and act in accordance with the
   rules of a religious order.


2. A declaration or assertion.

"oath"

1. A solemn pledge or promise, [..] to attest to the truth of a statement or sincerity of one's desire to fulfill a contract or promise


2. A statement or promise which is strengthened (affirmed) by such a pledge.

"pledge"

1. A solemn promise to do something.

or even "promise"

1. (countable) an oath or affirmation; a vow
   

wiktionary: pledge oath promise vow

This is called a Mission Statement. It's a set of goals and objectives the company tries to achieve.

A mission statement is a short statement of an organization's purpose, what its overall goal is, identifying the goal of its operations: what kind of product or service it provides, its primary customers or market, and its geographical region of operation. It may include a short statement of such fundamental matters as the organization's values or philosophies, a business's main competitive advantages, or a desired future state—the "vision".

You can find out more about it here

Wow, some of the words given are definitely very laden with connotation.

The specific word most commonly used would be "Mission", or more commonly, "Mission Statement". "Core Values" or "Values Statement" are also common, but mission will be your best bet for a single word.

I've worked for a lot of companies, from retail to corporate, offices to stores. While I might agree that at the time I worked for Best Buy (~1994) "manifesto" probably felt more accurate, no company would call it that, or vow, or affirmation (except possibly a strongly religious company, that I could see, but have no experience with). Creed and mantra make sense from a definition perspective, but I'd be shocked to learn of a company calling it that, also.

Covenant

Oxford English Dictionary:

A mutual agreement between two or more persons to do or refrain from
doing certain acts; a compact, contract, bargain; sometimes, the
undertaking, pledge, or promise of one of the parties.

If it is done in the following style:

1. Leader reads one line out loud


2. Everyone reads that same line out loud together


3. Leader reads the next line out loud


4. Everyone together ... etc

Then I have heard it termed "Chinese School".

I don't have a reference for that, and it is not widespread.

propaganda

According to Wiktionary:

A concerted set of messages aimed at influencing the opinions or behavior of large numbers of people.

It is derived from Congregātiō dē Propagandā Fide, "congregation for propagating the faith".

The definition of mantra quoted above is that it is "repeated" or "expressed", thus an action and not the words themselves that would make it a mantra. It is not the thing you say but the action of saying or expressing them that delineates the mantra.

The words that are determined or defined to be conveyed, make up the creed (or credo) of the business (in this case).

The "thing" in my view is a creed (or credo). The act of reciting it, is performing a mantra.

I can't comment yet or I would have done that, so instead, I answer.